Opinion
REYNOSO, J.
Martin Searle died as a result of a self-inflicted gunshot wound to the head. Under the terms of his life insurance policy his beneficiary, Alice M. Searle, was precluded from recovering the full value of the policy if death resulted from “suicide, whether sane or insane.” We address five questions: (1) Should we reconsider the conclusions reached on a prior appeal in this action concerning the meaning and validity of that clause of the policy notwithstanding the rule of law of the case? (2) Is the policy clause valid and unambiguous? (3) Must the insurance carrier, in order to avoid liability on the policy, carry the burden of proving that the insured’s act of self-destruction was intentional and not accidental? (4) If suicidal intent is proven, can the beneficiary nevertheless recover by demonstrating that the deceased was unable to understand the physical nature and consequences of his act? (5) Can the beneficiary recover by demonstrating that the deceased was unable to control his conduct and that the act therefore was the result of an irresistible impulse? As will appear below, we answer the first four questions in the affirmative and the fifth question in the negative.
I
In May 1975 Martin Searle was issued a life insurance policy in the face amount of $50,000 by defendant Allstate Life Insurance Company (All[430]*430state). Plaintiff Alice Searle, Martin’s second wife, was the named beneficiary. In accordance with the terms of the contract, Martin paid his monthly premiums. He had fully performed his monetary obligations to Allstate at the time of his death on March 13, 1976. He was then 37 years old.
Following Martin’s death, Alice Searle (Searle) filed a claim with Allstate for payment on the policy. In reliance on the clause that excluded coverage for “suicide, whether sane or insane,” within two years of the issuance of the policy, Allstate denied liability and refunded the premiums. Searle accepted the offer, though she later retendered the premiums. Allstate, however, refused the retender.
Searle sued Allstate for the full face value of the policy on the life of her husband. The parties agreed that death resulted from an act of self-destruction. Allstate moved for summary judgment citing the suicide exclusion clause. Its motion was granted on the basis of the undisputed testimony that Martin’s death occurred 10 months after the issuance of the policy and resulted from an act of self-destruction. Searle appealed.
The Court of Appeal, in Searle v. Allstate Life Ins. Co. (1979) 96 Cal.App.3d 614 [158 Cal.Rptr. 5] (hereinafter Searle I), reversed the summary judgment, finding a triable issue of fact as to whether the insured possessed the requisite intent to commit suicide. The court held that suicide definitionally required the taking of one’s life both intentionally and voluntarily or deliberately. (96 Cal.App.3d at p. 616.) The court concluded that if Martin was so insane as to be unable to form the requisite intent, his act was not suicide. The court held, therefore, that the phrase “suicide, whether sane or insane” was ambiguous and illogical and construed the ambiguity against Allstate as drafter of the policy. In conclusion, the appellate court stated, “If Martin was sane and intended to take his own life, then he committed suicide, and Allstate is liable for repayment of the premiums only. If, however, Martin was insane when he took his own life, then he did not commit suicide and Allstate is liable for the full value of the policy.” (Ibid.)
On remand the parties stipulated that “the remaining issue to be resolved concerns the mental capacity of Martin Searle at the time of his death in accordance with the decision of Searle v. Allstate Life Ins. Co., 96 Cal.App.3d 614.” The parties also stipulated that the matter would be submitted to the jury on special verdict forms, that Allstate had issued a policy to Martin Searle, that Martin died within two years of the issuance, that his [431]*431death was caused by a self-inflicted gunshot wound, that Allstate had tendered and refused retender of the premiums paid by Martin, and that the stipulation would not impair the right of any party to object to the contents of any instruction or verdict form.
At the jury trial before the San Diego County Superior Court, plaintiff presented the following facts. In March 1975, Martin retired from the Navy after completing 20 years of service as a radioman and communications instructor. In July 1975, Martin began to experience physical problems. The condition worsened gradually and he began to have problems climbing stairs and grasping and holding onto objects. Concerned about his condition, Martin decided to consult a physician at Balboa Hospital, a naval hospital in San Diego. In November 1975, Dr. Joseph Izzo, a neurosurgeon, performed surgery to stabilize Martin’s condition.
After the operation, Martin’s physical condition improved, although his left arm was so weakened that he was eventually unable to lift it over his head. In January 1976, and increasingly through February, Martin became depressed about his condition. Around January 1, 1976, Martin became sexually impotent. Martin made no express threats of suicide to his wife, his employer or his friends at this time, although he discussed his concern about his impotence with his wife, telling her that “if I lose that, you can forget me.”
On February 13, 1976, Martin saw Dr. Izzo for the last time. In addition to his impotence, Martin complained about sleeplessness, restlessness and weight gain in the face of a poor appetite. Dr. Izzo noted Martin’s depression and suggested he see a psychiatrist. Martin was adamantly opposed to this suggestion, but he agreed to take antidepressant drugs and stay in touch with Dr. Izzo.
The final contact between Dr. Izzo and Martin was a telephone conversation on March 12, 1976, the evening before Martin’s death. At trial, Dr. Izzo testified that Martin sounded happy and jovial and wanted to go off the medication.
Following the telephone call, Martin went to bed and had a very restless night. The next morning, Martin hugged and kissed his wife affectionately and said, “Honey, you better hang in there, things might get a little worse.”
That day, Martin and Searle discussed the insomnia problem and Martin said he thought he should get more medication from Dr. Izzo and that he was going to see a psychiatrist Monday morning. Martin said he had had a nightmare about being in jail for manslaughter. They discussed their vaca[432]*432tion plans and Searle testified that Martin was looking forward to that vacation.
After breakfast, Martin and Searle went shopping and purchased approximately one month’s supply of food. Martin also bought some trees and other items for the garden. He spent the afternoon gardening and doing other household chores. Later in the afternoon, the couple discussed going out, but decided it was too expensive and planned to stay at home and go out the following weekend instead. Before dinner, Searle got Martin to dance, which she had not been able to do for some time, but Martin stumbled and became bitter. Following dinner, they sent the children—two daughters from Martin’s first marriage and a neighbor’s child who was staying overnight—upstairs for bed.
Searle went upstairs to settle a dispute between the children. Martin then came upstairs and said, in reference to the children, “You’re not going to have to get on them anymore.”
Searle testified that she went into the master bedroom and Martin followed shortly thereafter. He appeared agitated and reached under the mattress, pulled out a gun, pointed it towards the children’s bedroom and ordered Searle to get the neighbor’s child and get out of the house. He repeated his order and threatened to “take them to hell with me.” When Searle asked, “Honey, what’s wrong?” Martin said, “I can’t take it anymore.”2 He then pointed the gun at his wife; she asked him not to hurt the children. Without responding, Martin raised the gun to his head and pulled the trigger. Searle testified that at the time the gun went off, Martin’s eyes widened and his face registered a surprised look.
Plaintiff also presented the opinion testimony of two expert witnesses. Dr. Izzo testified that Martin was in a state of rage, in a psychotic state, at the time he killed himself. He testified that Martin did not intend to kill himself and that Martin did not understand the nature and consequences of his act. He stated that “in our society, and in the context of our society and how we think” suicide is not the act of a sane person. Dr. Alan Davidson, a psychologist, testified that in his opinion, Martin had lost contact with reality and was psychotic. Dr. Davidson added that Martin did not intend to kill himself, because intention is a rationally motivated type of behavior. He further testified that Martin did not understand the nature and consequences of his act.
[433]*433Dr. Robert Litman, a psychiatrist and leading expert in the field of suicide and suicide prevention, was called to testify by the insurance company. Dr. Litman testified that he saw Martin as a proud, dominant man to whom it was very important to be in control. Dr. Litman believed that suicide presented an option to Martin, because his physical injuries and threatened sense of masculinity were very real problems which he could not control. Dr. Litman saw many clues that indicated Martin intended to commit suicide. Thus, Dr. Litman interpreted Martin’s request that he be taken off the medication to mean that Martin had decided to handle things himself, and Dr. Litman described the dream about being in prison for manslaughter as indicating Martin’s feeling of guilt about killing himself. Dr. Litman’s opinion was that Martin was experiencing normal depression and characterized the death as “almost a typical case of suicide.” Finally, Dr. Litman disagreed with Dr. Izzo and stated that few persons who commit suicide are insane. He used the term “insane” to describe the mental state of a person who could be committed to a hospital against his or her will.
At the conclusion of the trial, the court instructed the jury that Searle had the burden of proving that Martin did not intend to take his own life and charged them to return special verdicts on whether it had been proved by the preponderance of evidence that at the time of the shooting Martin did not have the mental capacity (1) “to intend to take his life, including awareness of the nature and consequences of his act of self-destruction” or (2) “to govern his own conduct.”3 The jury found that Martin did have the mental capacity to intend to take his life and to govern his own conduct at the time he shot himself. On the basis of those special findings (there being no general verdict), the court entered judgment for Allstate.
Searle appeals, challenging the allocation of the burden of proof on the questions of intent and insanity. Additionally, she alleges error in the refusal [434]*434of the trial court to give her requested instruction on the definition of suicide.
n
A. Law of the Case
This court has never ruled on the construction of the clause limiting the insurer’s liability where death results from “suicide, whether sane or insane.”4 The Court of Appeal concluded in Searle I that the clause is ambiguous because a person who “is insane and thus is incapable of forming the intent to commit suicide” cannot do so. It further held that summary judgment was improper inasmuch as Allstate could not avoid liability for the full value of the policy without a determination that Martin Searle “was sane and intended to take his own life.” (96 Cal.App.3d at p. 616.) We believe that the Court of Appeal erred in holding the clause ambiguous and in indicating that sanity is a necessary element of suicide. Apart from that error, we further conclude that the jury instructions charging Searle with the burden of proving the insanity of the deceased, constituted reversible error.
The rule of “law of the case” generally precludes multiple appellate review of the same issue in a single case. The doctrine applies to this court even though the previous appeal was before a Court of Appeal. In United Dredging Co. v. Industrial Acc. Com. (1930) 208 Cal. 705 [284 P. 922], this court stated: “Where a decision upon appeal has been rendered by a District Court of Appeal and the case is returned upon a reversal, and a second appeal comes to this court directly or intermediately, for reasons of policy and convenience, this court generally will not inquire into the merits of said first decision, but will regard it as the law of the case.” (Id. at p. 712; see also Davies v. Krasna (1975) 14 Cal.3d 502, at p. 507, fn. 4 [121 Cal.Rptr. 705, 535 P.2d 1161, 79 A.L.R.3d 807].) As we stated in People v. Shuey (1975) 13 Cal.3d 835, 842 [120 Cal.Rptr. 83, 533 P.2d 211], “[t]he doctrine, as the name implies, is exclusively concerned with issues of law and not fact.”
As noted by this court, however, the “doctrine of law of the case . . . is not inflexible.” (Davies v. Krasna, supra, at p. 507, fn. 5.) In [435]*435England v. Hospital of Good Samaritan (1939) 14 Cal.2d 791 [97 P.2d 813], a third appeal was taken to this court and we departed from the rule of law of the case noting that “a court is not absolutely precluded by the law of the case from reconsidering questions decided upon a former appeal. Procedure and not jurisdiction is involved. Where there are exceptional circumstances, a court which is looking to a just determination of the rights of the parties to the litigation and not merely to rules of practice, may and should decide the case without regard to what has gone before.” (Id., at p. 795.) But “[i]n the absence of exceptional circumstances of hardship and injustice the need for attributing finality to considered judicial determinations compels adherence to the previous decision.” (Gore v. Bingaman (1942) 20 Cal.2d 118, 123 [124 P.2d 17].) Though we have recognized that the rule will be disregarded when necessary to avoid an “unjust decision” (e.g., DiGenova v. State Board of Education (1962) 57 Cal.2d 167, 179 [18 Cal.Rptr. 369, 367 P.2d 865]), that exception must rest on “a manifest misapplication of existing principles resulting in substantial injustice” and not on mere disagreement with the prior appellate determination. (People v. Shuey, supra, 13 Cal.3d 835, 846.)
Here, however, there is another reason, apart from the degree of injustice that might result from our now following Searle I, for our not regarding ourselves bound by that decision as the law of the case. The primary purpose served by the law-of-the-case rule is one of judicial economy. Finality is attributed to an initial appellate ruling so as to avoid the further reversal and proceedings on remand that would result if the initial ruling were not adhered to in a later appellate proceeding. (People v. Shuey, supra, 13 Cal.3d 835, 840-841; People v. Durbin (1966) 64 Cal.2d 474, 477 [50 Cal.Rptr. 657, 413 P.2d 433]; Gore v. Bingaman, supra, 20 Cal.2d 118, 123.) That reason for the rule is inoperative when the court hearing the subsequent appeal determines that there should be a reversal on a ground that was not considered on the prior appeal. The fact that reversal is necessary in any event frees us from the compulsion that the rule of law of the case might otherwise impose on us to follow a ruling in the prior appeal that we now perceive to be manifestly erroneous. (State v. Zimmerman (1977) 175 Mont. 179 [573 P.2d 174, 178]; State v. Hale (1955) 129 Mont. 449 [291 P.2d 229, 235]; Barton v. Thompson (1881) 56 Iowa 571 [9 N.W. 899]; Pennington v. Gillaspie (1910) 66 W.Va. 643 [66 S.E. 1009].)
As already noted, we shall conclude herein that the trial court below committed reversible error in misallocating the burden of proof in its instructions to the jury. Since Searle I was an appeal from a summary judgment, the Court of Appeal had no occasion to, and did not, rule on the burden of proof. Because we must reverse on that ground, this litigation will not be prolonged or complicated by our providing guidance on the [436]*436meaning of “suicide, whether sane or insane” even though the guidance diverges from some of the conclusions drawn in Searle I.
B. Meaning of “Suicide, Whether Sane or Insane”
The Court of Appeal reasoned that an insane person could not commit suicide and that, therefore, the phrase “suicide, whether sane or insane” was ambiguous. The weight of authority, however, supports a contrary conclusion. The phrase “suicide, sane or insane,” or its equivalent, has been used in life and accident insurance policies for nearly 100 years. In Bigelow v. Berkshire Life Insurance Co. (1876) 93 U.S. 284 [23 L.Ed. 918], plaintiff beneficiary sued upon a life insurance policy which provided that it would be void if the insured died by suicide, “sane or insane.” The Supreme Court stated: “The words of this stipulation, ‘shall die by suicide (sane or insane),’ must receive a reasonable construction.” (Id., at p. 286 [23 L.Ed. at p. 919].)
In specifically addressing the question of the ambiguity of the phrase, the court stated, “Nothing can be clearer than that the words, ‘sane or insane,’ were introduced for the purpose of excepting from the operation of the policy any intended self-destruction, whether the insured was of sound mind or in a state of insanity. ... In the popular, as well as the legal, sense, suicide means, as we have seen, the death of a party by his own voluntary act; and this condition, based, as it is, on the construction of this language, informed the holder of the policy, that, if he purposefully destroyed his own life, the company would be relieved from liability. It is unnecessary to discuss the various phases of insanity, in order to determine whether a state of circumstances might not possibly arise which would defeat the condition. . . . For the purposes of this suit, it is enough to say, that the policy was rendered void, if the insured was conscious of the physical nature of his act, and intended by it to cause his death, although, at the time, he was incapable of judging between right and wrong, and of understanding the moral consequences of what he was doing.” {Id. at p. 287 [23 L.Ed. at p. 919].)
Several other jurisdictions have held that a policy which does not insure the risk of “suicide, whether sane or insane” means suicide by intentional self-destruction by an insane or sane person. (See, e.g., Johnson v. Metropo-litan Life Insurance Company (3d Cir. 1968) 404 F.2d 1202, 1204; Strasberg v. Equitable Life Assur. Soc. of U.S. (1952) 281 App.Div. 9 [117 N.Y.S.2d 236, 240] [“self-destruction sane or insane”]; 9 Couch, Insurance (2d ed. 1962) § 40:41, pp. 671-672.)
Thus, we conclude that the phrase “suicide, sane or insane” must be construed to include suicide committed by insane persons. Although the [437]*437degree of understanding of the physical nature and consequences of the act was in doubt in the case at bench, we conclude the court in Searle I erred in holding the clause ambiguous and in reasoning that insanity necessarily precludes formation of the intent to commit suicide.
A proper interpretation of the clause is that it exempts the insurance company from liability only if the insured, whether sane or insane at the time, committed the act of self-destruction with suicidal intent. If suicidal intent is negated by a determination that the insured did not understand the physical nature and consequences of the act, then the company may be held liable for the full amount of the policy.
C. Suicide: The Requirement of Proof of Suicidal Intent
The trial court instructed the jury that Searle had the burden of proving that Martin did not intend to commit suicide. We conclude that this allocation of the burden of proof was erroneous. In order to avoid liability on the life insurance policy, Allstate had the burden of proving suicide. Such burden, we conclude, requires more than proof of the act of self-destruction, the proof must further establish that the act was committed with suicidal intent, i.e., the purposeful or intentional causing of death.5
In Beers v. California State Life Ins. Co. (1927) 87 Cal.App. 440 [262 P. 380], the insured died from the effect of strychnine poisoning. The insured had been issued a life insurance policy which limited recovery to premiums paid if death resulted from “suicide . . ., committed while sane or insane. ” (Id. at p. 444.) The sole issue submitted to the jury was whether the poison was administered with suicidal intent. The appellate court affirmed the jury verdict for plaintiff beneficiary because “whether the defendant introduced sufficient satisfactory proof ... to sustain [the defense of suicide] . . . was a question to be solved by the jury, with whose conclusion we are not privileged, legally, to interfere, unless the evidence of suicide is upon its face obviously such as to compel us to hold that no other inference but that of intentional self-destruction may reasonably be drawn.” (Id. at p. 457.)
The burden of proving intent is properly allocated to the party charged with proving suicide. It is well established that the burden of proving an excepted risk or condition subsequent which negates full liability is on the insurer and not on the beneficiary. In Executive Aviation, Inc. v. National [438]*438Ins. Underwriters (1971) 16 Cal.App.3d 799, 806 [94 Cal.Rptr. 347], the burdens of proof on the insured and insurer were explained. “Although the insured had the burden of proving the contract of insurance and its terms, as well as the loss, the burden of bringing itself within any exculpatory clause contained in the policy is on the insurer.”
Specifically, in the context of life insurance policies, this court has stated that “one seeking to recover on an insurance policy must aver the loss and show that it occurred by reason of a peril insured against, but he need not aver the performance of conditions subsequent, nor negative prohibited acts, nor deny that the loss occurred from the excepted risks.” (Dennis v. Union Mut. Life Ins. Co., supra, 84 Cal. 570, 572.) Provisions avoiding liability in case of suicide, sane or insane, are conditions subsequent (9 Couch, Insurance (2d ed. 1962) § 40:39, p. 670) and therefore the burden of proving the exclusion rests on the insurer.
We reject Allstate’s contention that it has satisfied its burden of proof by means of the pretrial stipulation. Allstate argues that plaintiff Searle, by agreeing to the fact that Martin died of a self-inflicted gunshot wound, conceded that insurer established a prima facie case of suicide and all remaining issues, if any, must be proven by plaintiff.
The insurance carrier argues that self-destruction and suicide are synonymous, relying on Dennis v. Union Mut. Life Ins. Co., supra, 84 Cal. 570. In Dennis, however, the excepted risk in the policy was death by “self-destruction” (id. at p. 571) and although the court found that the insurer had “committed suicide, or self-destruction, with a pistol, while temporarily insane,” (id. at p. 572) the suggestion that the two terms are equivalent is mere dicta. Additionally, Allstate cites Black’s Law Dictionary (4th ed. 1968, at p. 1602) and quotes the definition: “Suicide: Self destruction;” The complete definition, however, reads “Self destruction; the deliberate termination of one’s existence, while in the possession and enjoyment of his mental faculties.” (Ibid., italics added.)
It is well established that a stipulation in proper form within the authority of the attorneys is binding on the parties. (Palmer v. City of Long Beach (1948) 33 Cal.2d 134, 141 [199 P.2d 952]; 1 Witkin, Cal. Procedure (2d ed. 1970) Attorneys, § 125, p. 137.) However, “[stipulations must be given a reasonable construction with a view to giving effect to the intent of the parties and ‘the language used will not be so construed as to give it the effect of an admission of fact obviously intended to be controverted, or the waiver of a right not plainly intended to be relinquished. . . (Palmer v. City of Long Beach, supra, at p. 144.) So construing the stipulation of the parties in the instant matter, we conclude that the issue of suicidal [439]*439intent was meant to be controverted. The stipulation’s provision that mental capacity was in issue is consistent with the conclusion that plaintiff did not agree that Allstate had established suicidal intent.
The burden of proving suicidal intent was on the insurance company and reversal is proper if the erroneous instruction was likely to mislead the jury and thus become a factor in its verdict. (Henderson v. Harnischfeger Corp. (1974) 12 Cal.3d 663, 670 [117 Cal.Rptr. 1, 527 P.2d 353].)
In the instant case, the effect of the trial court’s instruction was to impose a burden of proof which plaintiff was not bound to meet. The jury, upon hearing and reading the instruction, might reasonably conclude that it had to be convinced by a preponderance of the evidence that Martin acted unintentionally before favoring plaintiff. Instead, before Allstate could claim exception from full liability, it had the burden of showing an intentional act of self-destruction. Under the trial court’s instructions, Allstate carried no burden of proving any of the contested issues. We conclude that this constituted reversible error.
D. Relevance of Evidence of Mental Capacity
We also conclude that the court erred in the first appeal by concluding that insanity necessarily implies a lack of mental capacity to commit suicide. Mental capacity is relevant to the determination of whether an act of self-destruction was committed by the insured with suicidal intent. If the insured did not understand the physical nature and consequences of the act, whether he was sane or insane, then he did not intentionally kill himself. Although the ultimate burden of proving suicidal intent by a preponderance of the evidence remains on the insurer, the beneficiary should be permitted to present evidence to negate suicidal intent.
Allstate argues that section 522 of the Evidence Code applies. That section places the burden of proving insanity on the party claiming a person is or was insane. However, under the insuring clause now before us the issue of whether the insured was sane or insane does not enter into our consideration. The language of the first appellate decision is misleading in this regard. The court’s conclusion in Searle / that “[i]f . . . [the insured] was insane when he took his own life, then he did not commit suicide” (96 Cal.App.3d at p. 616) is overbroad but is qualified by earlier statements which equate insanity with an inability to form the requisite suicidal intent. “If a person is insane and thus is incapable of forming the intent to commit suicide, how can that person commit suicide?” (Id.) If “insanity” is given that restricted meaning, the quoted formulation parallels the position we adopt as well as the position of several other jurisdictions.
[440]*440Allstate further argues that the phrase “suicide, sane or insane” negates any issue of state of mind. Many jurisdictions have directly addressed this issue, and a distinct split of authority has arisen in construing the “suicide, sane or insane” exclusion found in many life insurance policies. (See 1B, Appleman, Insurance Law and Practice (rev. ed. 1981) § 493, at pp. 348-355; 9 Couch, Insurance (2d ed. 1962) § 40:39 et seq., at p. 670; 43 Am.Jur.2d, Insurance, § 539 et seq., at p. 609; Annot., Insurance: Construction of “Sane or Insane” Provision of Suicide Exclusion (1966) 9 A.L.R.3d 1015.) While the apparent numerical weight of authority supports the position asserted by Allstate (see 9 Couch, Insurance, supra, § 40:42, at p. 673), a sizeable minority has concluded that if the insured “is so utterly insane that he does not realize what he is doing or that the act will cause death, then a recovery may be allowed.” (1B Appleman, Insurance, supra, § 493 at p. 351.) Investigation by the court into the deceased’s ability to understand the physical nature and consequences of the act of self-destruction is required in those jurisdictions. (See, e.g., Strasberg v. Equitable Life Assur. Soc. of U.S., supra, 117 N.Y.S.2d 236; Muzenich v. Grand Carniolian Slovenian Catholic Union (1941) 154 Kan. 537 [119 P.2d 504, 138 A.L.R. 818]; New York Life Insurance Co. v. Dean (1928) 226 Ky. 597 [11 S.W.2d 417].)
As discussed above, we adopt the position that Allstate must carry the ultimate burden of proving, by a preponderance of the evidence, that the act was performed with suicidal intent. Evidence that the insured did not understand the nature and consequences of the act is relevant and admissible to negate proof of intent. This allocation of proof is supported by Evidence Code, section 500 which states that “a party has the burden of proof as to each fact the existence or nonexistence of which is essential to the claim for relief or defense that he is asserting.” In the case at bench, Allstate must prove suicide to defeat Searle’s claim of liability. Although the beneficiary may introduce evidence indicating the insured did not intend to commit suicide, the ultimate burden of proving the fact essential to a claim of non-liability rests with the insurer.
E. Irresistible Impulse
The trial court instructed the jury that Searle had the burden of proof not only on the issue of suicidal intent but also on Martin’s lack of “mental capacity to govern his own conduct at the time he shot himself” (see fix. 3, ante). Since the jury found against Searle on both issues, it is unclear what effect the trial court would have given to a verdict that Martin lacked capacity to govern his own conduct even though he was able to form a suicidal intent at the time he shot himself. For guidance on retrial, we consider the relevance, if any, of a finding of inability to govern one’s conduct. [441]*441To put it another way, we consider whether suicidal intent can be negated by proof that the decedent killed himself under the compulsion of an irresistible impulse.
We think not. As already explained, insanity or other mental derangement does not negate suicidal intent if the decedent is shown to have performed the self-destructive act with an understanding of its physical nature and consequences. Proof that the act was impelled by an irresistible impulse would merely establish that “self-destruction was the very result intended, albeit by a deranged mind.” (Johnson v. Metropolitan Life Insurance Company, supra, 404 F.2d 1202, 1204.) Thus, proof of the irresistible impulse would not be inconsistent with a finding of suicide while insane. (Ibid.; Nielsen v. Provident Life and Acc. Ins. Co. (1979) 100 Idaho 223 [596 P.2d 95, 98]; Strasberg v. Equitable Life Assur. Soc. (Sup.Ct. 1949) 196 Misc. 387 [91 N.Y.S.2d 903]; National Life Ins. Co. v. Watson (1922) 194 Ky. 355 [239 S.W. 35, 35 A.L.R. 156].)
In conclusion we hold that the clause limiting the insurer’s liability if death results from “suicide, sane or insane” is unambiguous. Further, we conclude that the trial court erred in requiring plaintiff to carry the burden of proving that Martin Searle did not intend to commit suicide and did not possess the mental capacity to intend to commit suicide. Although plaintiff was entitled to present evidence that Martin did not have the capacity to form suicidal intent, the burden of proving suicidal intent should have been placed on Allstate.
The judgment is reversed and the cause remanded for proceedings consistent with this opinion.
Kaus, J., Broussard, J., Grodin, J., and Ackerman, J.,* concurred.
Assigned by the Chairperson of the Judicial Council.