Agid, J.
¶1 Tambra Curtis walked onto John and Claire Leins’ dock and her left leg went through it, causing her injuries. The Leins’ postaccident dock destruction deprived Curtis of evidence about the dock’s condition. Because Penson v. Inland Empire Paper Co.1 holds that reasonably safe wooden structures do not ordinarily give way under normal use, res ipsa loquitur provides an inference that the Leins breached their duty to provide premises free of unreasonably dangerous conditions. But Curtis must also offer evidence from which a reasonable jury could find that the Leins should have discovered the dock’s defect. Res ipsa loquitur does not carry that burden for her because everyday experience does not teach that dangerous docks ordinarily exhibit discoverable defects. Although Penson also holds that the defects in an inadequate board are discoverable when [100]*100the board is put in place soon before it breaks, that kind of inspection was not possible here. Nor is there any evidence that the Leins knew, should have known, or had any reason to suspect there was a defect in the dock. Expanding Penson to include the facts in this case would create the potential for premises liability every time a structure fails regardless of whether a defect was discoverable. We affirm the trial court’s summary judgment dismissal.
FACTS
¶2 John and Claire Lein bought Willow Creek Farm, Inc., in what is now Sammamish, Washington, in 1978.2 The Leins moved to the property in the early 1980s. They sold Willow Creek Farm around 2001 but continued to live there until November 2004 along with their son, Mike, his wife, Donna, and their children. Claire bred and raised racehorses on the farm.3 After they bought the farm, the Leins enlarged a pond on the property and installed an overflow drainage system that directed water under the pond’s earthen dam. The pond was primarily decorative, but the Leins’ grandchildren sometimes swam in it. Because the drainage pipes sometimes clogged, the Leins had a dock built from the bank to a point above the pipes to make unclogging easier.4 The dock was finished at some point in the late 1980s. The pond and dock were open to all the farm’s residents.
¶3 The Leins hired Michael Stewart as farm manager in late 2001 and provided him, his girl friend, Tambra Curtis, and their son with housing on the farm. Curtis did not work [101]*101on the farm. On Sunday, April 25, 2004, Curtis was taking turns riding a horse with a friend. While waiting for her friend to finish riding, Curtis decided to walk out on the dock for the first time since she had been on the farm. After a couple steps, Curtis’s left leg went through the dock.5 Because her leg protruded through the dock past her knee and up to her hip, Curtis was stuck in the dock until Stewart came over and helped her out. The next day, Donna drove Curtis to the doctor. Curtis missed about three weeks of work. Several months after the accident, Curtis’s doctors determined she had suffered a hairline fracture of her tibia.
¶4 Claire had Stewart remove the dock after he told her that Curtis’s leg had gone through it.6 Before Curtis’s accident, Claire never observed that the dock was in need of repair. She did not inspect the dock after the accident. Stewart walked on the dock more times than he could remember and did not have reason to believe the dock was in poor condition. While helping Curtis out of the dock, Stewart observed that the board Curtis stepped on had cracked and broken, but he does not recall what kind of condition the board or dock was in. He does not remember destroying the dock. Mike Lein never had any reason to think the dock needed repairs. Donna testified that she was on the dock frequently and never had any reason to believe the dock was unsafe. Curtis remembers Donna describing the dock as “weathered” and believes the Leins were aware the dock was not safe because their grandchildren told her then five year old child so.
¶5 Curtis brought a personal injury action against the Leins and Willow Creek Farms, Inc., alleging that they knew or should have known about the dangerous condition of the dock and failed to remedy the dangerous condition. The Leins moved for summary judgment, which the trial [102]*102court granted. The trial court ruled that Curtis failed to present evidence from which a reasonable trier of fact could have found that the Leins knew or should have known about the dock’s allegedly dangerous condition. And the trial court ruled that res ipsa loquitur does not apply because causes other than the Leins’ negligence could have contributed to the dock’s failure.7 Curtis appealed after the trial court denied her motion for reconsideration.
DISCUSSION
¶6 This court reviews summary judgment orders de novo and engages in the same inquiry as the trial court.8 The reviewing court must construe the facts and all reasonable inferences from those facts in the light most favorable to the nonmoving party.9 A material fact is a fact upon which the outcome of the litigation depends.10 The burden is on the moving party to show there is no issue of material fact.11 The nonmoving party must set forth specific facts that demonstrate a genuine issue of material fact and cannot rest on mere allegations.12 The reviewing court will affirm a summary judgment if there are no genuine issues of material fact and the moving party is entitled to judgment as a matter of law.13
¶7 In an action for negligence, a plaintiff must prove (1) the existence of a duty, (2) breach of that duty, (3) [103]*103resulting injury, and (4) proximate cause.14 The threshold determination of whether a duty exists is a question of law.15 The existence of a duty may be predicated on statutory provisions or on common law principles.16 Under Washington common law, a land possessor’s duty of care is governed by the entrant’s common law status as an invitee, licensee, or trespasser.17 Residential tenants and their guests are invitees.18 Here, Curtis was either a tenant or a tenant’s guest. In either case, she was an invitee. In general, one who possesses land owes an affirmative duty to invitees to use ordinary care to keep the premises in a reasonably safe condition.19 But under the Restatement standard followed in Washington, liability for dangerous conditions on the land attaches only when the possessor knows of the condition or should have discovered the condition upon inspection.20 In other words, possessors must exercise reasonable care to discover dangerous condi[104]*104tions, but “[t]here is no liability for an undiscoverable latent defect.”21
¶8 Curtis alleges that the Leins breached their duty to maintain reasonably safe premises. Deposition testimony shows that the dock was weathered and roughly 15 to 20 years old at the time of the accident, that the Leins had sold the property, and that they knew the new owners planned on leveling the farm to build a school.
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Agid, J.
¶1 Tambra Curtis walked onto John and Claire Leins’ dock and her left leg went through it, causing her injuries. The Leins’ postaccident dock destruction deprived Curtis of evidence about the dock’s condition. Because Penson v. Inland Empire Paper Co.1 holds that reasonably safe wooden structures do not ordinarily give way under normal use, res ipsa loquitur provides an inference that the Leins breached their duty to provide premises free of unreasonably dangerous conditions. But Curtis must also offer evidence from which a reasonable jury could find that the Leins should have discovered the dock’s defect. Res ipsa loquitur does not carry that burden for her because everyday experience does not teach that dangerous docks ordinarily exhibit discoverable defects. Although Penson also holds that the defects in an inadequate board are discoverable when [100]*100the board is put in place soon before it breaks, that kind of inspection was not possible here. Nor is there any evidence that the Leins knew, should have known, or had any reason to suspect there was a defect in the dock. Expanding Penson to include the facts in this case would create the potential for premises liability every time a structure fails regardless of whether a defect was discoverable. We affirm the trial court’s summary judgment dismissal.
FACTS
¶2 John and Claire Lein bought Willow Creek Farm, Inc., in what is now Sammamish, Washington, in 1978.2 The Leins moved to the property in the early 1980s. They sold Willow Creek Farm around 2001 but continued to live there until November 2004 along with their son, Mike, his wife, Donna, and their children. Claire bred and raised racehorses on the farm.3 After they bought the farm, the Leins enlarged a pond on the property and installed an overflow drainage system that directed water under the pond’s earthen dam. The pond was primarily decorative, but the Leins’ grandchildren sometimes swam in it. Because the drainage pipes sometimes clogged, the Leins had a dock built from the bank to a point above the pipes to make unclogging easier.4 The dock was finished at some point in the late 1980s. The pond and dock were open to all the farm’s residents.
¶3 The Leins hired Michael Stewart as farm manager in late 2001 and provided him, his girl friend, Tambra Curtis, and their son with housing on the farm. Curtis did not work [101]*101on the farm. On Sunday, April 25, 2004, Curtis was taking turns riding a horse with a friend. While waiting for her friend to finish riding, Curtis decided to walk out on the dock for the first time since she had been on the farm. After a couple steps, Curtis’s left leg went through the dock.5 Because her leg protruded through the dock past her knee and up to her hip, Curtis was stuck in the dock until Stewart came over and helped her out. The next day, Donna drove Curtis to the doctor. Curtis missed about three weeks of work. Several months after the accident, Curtis’s doctors determined she had suffered a hairline fracture of her tibia.
¶4 Claire had Stewart remove the dock after he told her that Curtis’s leg had gone through it.6 Before Curtis’s accident, Claire never observed that the dock was in need of repair. She did not inspect the dock after the accident. Stewart walked on the dock more times than he could remember and did not have reason to believe the dock was in poor condition. While helping Curtis out of the dock, Stewart observed that the board Curtis stepped on had cracked and broken, but he does not recall what kind of condition the board or dock was in. He does not remember destroying the dock. Mike Lein never had any reason to think the dock needed repairs. Donna testified that she was on the dock frequently and never had any reason to believe the dock was unsafe. Curtis remembers Donna describing the dock as “weathered” and believes the Leins were aware the dock was not safe because their grandchildren told her then five year old child so.
¶5 Curtis brought a personal injury action against the Leins and Willow Creek Farms, Inc., alleging that they knew or should have known about the dangerous condition of the dock and failed to remedy the dangerous condition. The Leins moved for summary judgment, which the trial [102]*102court granted. The trial court ruled that Curtis failed to present evidence from which a reasonable trier of fact could have found that the Leins knew or should have known about the dock’s allegedly dangerous condition. And the trial court ruled that res ipsa loquitur does not apply because causes other than the Leins’ negligence could have contributed to the dock’s failure.7 Curtis appealed after the trial court denied her motion for reconsideration.
DISCUSSION
¶6 This court reviews summary judgment orders de novo and engages in the same inquiry as the trial court.8 The reviewing court must construe the facts and all reasonable inferences from those facts in the light most favorable to the nonmoving party.9 A material fact is a fact upon which the outcome of the litigation depends.10 The burden is on the moving party to show there is no issue of material fact.11 The nonmoving party must set forth specific facts that demonstrate a genuine issue of material fact and cannot rest on mere allegations.12 The reviewing court will affirm a summary judgment if there are no genuine issues of material fact and the moving party is entitled to judgment as a matter of law.13
¶7 In an action for negligence, a plaintiff must prove (1) the existence of a duty, (2) breach of that duty, (3) [103]*103resulting injury, and (4) proximate cause.14 The threshold determination of whether a duty exists is a question of law.15 The existence of a duty may be predicated on statutory provisions or on common law principles.16 Under Washington common law, a land possessor’s duty of care is governed by the entrant’s common law status as an invitee, licensee, or trespasser.17 Residential tenants and their guests are invitees.18 Here, Curtis was either a tenant or a tenant’s guest. In either case, she was an invitee. In general, one who possesses land owes an affirmative duty to invitees to use ordinary care to keep the premises in a reasonably safe condition.19 But under the Restatement standard followed in Washington, liability for dangerous conditions on the land attaches only when the possessor knows of the condition or should have discovered the condition upon inspection.20 In other words, possessors must exercise reasonable care to discover dangerous condi[104]*104tions, but “[t]here is no liability for an undiscoverable latent defect.”21
¶8 Curtis alleges that the Leins breached their duty to maintain reasonably safe premises. Deposition testimony shows that the dock was weathered and roughly 15 to 20 years old at the time of the accident, that the Leins had sold the property, and that they knew the new owners planned on leveling the farm to build a school. Curtis did not put on any direct evidence from which a jury could have concluded that the Leins breached their duty. Instead, Curtis relies on the doctrine of res ipsa loquitur for the inference that docks maintained in a reasonably safe condition do not ordinarily give way under normal use. When the doctrine applies, res ipsa loquitur “spares the plaintiff the requirement of proving specific acts of negligence in cases where a plaintiff asserts that he or she suffered injury, the cause of which cannot be fully explained, and the injury is of a type that would not ordinarily result if the defendant were not negligent. In such cases [,] the jury is permitted to infer negligence ... on the basis that the evidence of the cause of the injury is practically accessible to the defendant but inaccessible to the injured person.”22
¶9 The question of whether the doctrine applies to a particular case is a question of law.23 We review questions of law de novo.24 The doctrine applies when
“(1) the accident or occurrence producing the injury is of a kind which ordinarily does not happen in the absence of someone’s negligence, (2) the injuries are caused by an agency or instrumentality within the exclusive control of the defendant, and (3) [105]*105the injury-causing accident or occurrence is not due to any voluntary action or contribution on the part of the plaintiff.”
The Leins argue that Curtis failed to satisfy the “exclusive control” element of res ipsa loquitur. But the evidence shows that the Leins had the dock built on their property so that they could clear the drainpipes in their pond. And the evidence shows that the Leins ordered their employee to take the dock down as soon as they found out about the accident, which he did. Once the dock was removed, any evidence Curtis could have used to prove her case was also destroyed. These facts satisfy the exclusive control element of res ipsa loquitur.26
¶10 The Leins claim that improper construction or defective wood could cause docks to give way in the absence of negligence, meaning that res ipsa loquitur would not apply in this case.27 This argument is unpersuasive for three reasons. First, res ipsa loquitur still applies when the plaintiff cannot eliminate with certainty all other possible causes.28 Second, the alternative explanations offered by the Leins do not necessarily suggest the absence of negligence. Because the Leins had a duty to use ordinary care to maintain the premises in a reasonably safe condition, keep[106]*106ing a dangerous dock on the premises breaches that duty whether the danger was caused by rot, defective wood, or improper construction.29 Finally, there is a Washington case holding that res ipsa loquitur applies to explain why a wooden structure would give way. In Penson30 a two-by-four supporting a scaffold broke, injuring the worker who had been standing on the scaffold.31 The worker relied on res ipsa loquitur for a prima facie inference of negligence, and the Washington Supreme Court held that the doctrine applied because the breaking of the two-by-four by itself demonstrated that it was inadequate.32 Accordingly, we agree with Curtis’s contention that wooden structures do not ordinarily give way under normal use on premises that have been maintained to provide for reasonably safe conditions.
¶11 Because “[t]here is no liability for an undiscoverable latent defect,”33 Curtis also has the burden of showing that the dock’s defect was discoverable.34 Deposition testimony shows that the Leins did not actually know that the dock was defective and that Stewart, their employee, regularly walked on the dock and did not notice any problems. Curtis did not notice anything obviously wrong with the dock [107]*107before she walked out on it and does not remember anything about the dock’s condition, other than the fact that her leg went through it. Stewart testified that Curtis’s foot broke through a board, but he does not remember anything else about the condition of the dock. From this evidence, a reasonable jury would not be able to conclude that the dock’s dangers were obvious or known. Although none of the evidence rules out the possibility of a nonobvious defect that could have been discovered upon a closer inspection, Curtis must prove at trial that a reasonable inspection would have revealed something wrong with the dock. Because she fails to offer evidence from which a reasonable jury could find without speculating that the defect was discoverable, she cannot make out a prima facie case for premises liability.
¶12 Res ipsa loquitur provides the commonsense inference that reasonably safe docks do not ordinarily give way, but it does not follow that dangerous docks ordinarily exhibit discoverable defects. Instead, general experience teaches that the discoverability of a wooden structure’s flaw depends on the type of structure and the type of defect. For example, if rotting wood ordinarily signals impending failure, other defects—such as improper construction or defective wood—are not necessarily obvious or discoverable. Here, the testimony, limited as it is, suggests that the board cracked underfoot. That is the type of defect which can occur suddenly and without any opportunity for discovery. Curtis asks the court to extend res ipsa loquitur beyond the realm of everyday experience: applying the doctrine here would require the jury to speculate about the structural properties of wood and the location of the defect.35
¶13 Although Penson held that the fact of a scaffold’s collapse provides an inference that two-by-four supporting [108]*108the scaffold was discoverably inadequate,36 it does not control the question of whether the condition of this dock was discoverable. First, the facts of Penson show that the employer’s agent was building one section of scaffolding, taking that section down, and then building a new section with the same lumber.37 Accordingly, the employer’s agent had the opportunity to examine both sides of each board shortly before use. Here, the boards were incorporated into a dock that was built 15 to 20 years before Curtis stepped through it, so any opportunity to inspect the structural integrity of both sides of the dock’s boards had long since passed. Although a jury is normally charged with deciding whether a land possessor should have discovered a dangerous condition,38 no reasonable jury could find that possessors are required to take a dock apart to closely inspect both sides of the dock’s boards when a person who had walked on that dock more times than he could remember did not notice anything wrong with it. Thus, res ipsa loquitur does not supply an inference that the dock’s dangerous condition was discoverable.
¶14 Additionally, Penson involved workplace injuries, not premises liability. While the duty owed to employees when Penson was decided is the same as the duty owed to invitees now,39 its applicability is limited by the context in which it was decided.40 The court decided the case during the height of dissatisfaction with the ability of fault-based [109]*109adjudication to provide a fair remedy for workplace injuries.41 We note that in the nearly 100 years since Penson was decided, neither the courts nor the legislature has done away with fault-dependent recovery for premises liability, and we decline to extend Penson’s generous application of res ipsa loquitur. Expanding the doctrine to cover these facts would create the potential for liability every time a structure collapses regardless of whether the defect was discoverable. Unless the possessor is able to offer convincing exculpatory evidence, as the employer failed to do in Penson,42 liability would flow automatically from the inference of negligence provided by res ipsa loquitur.43 Penson’s outcome reflects the efforts of its era to mitigate the harsh results of pre-worker’s-compensation workplace injury litigation.44 But premises liability has not developed along a similar track, and the case law makes it clear that landowners do not have an absolute duty to ensure the safety of all invitees.45
¶15 We affirm.
Dwyer, A.C.J., and Ellington, J., concur.
Review granted at 167 Wn.2d 1004 (2009).
25 Pacheco, 149 Wn.2d at 436 (internal quotation marks omitted) (quoting Zukowsky v. Brown, 79 Wn.2d 586, 593, 488 P.2d 269 (1971)). The Leins concede that the dock’s failure was not due to any voluntary action on the part of Curtis.