Also known as: victim incapable of consent · incapable of consenting victim · incapacity to consent · victim incapacity
Written by attorneys · grounded in primary & secondary sources — see below
A condition rendering apparent consent ineffective when an individual lacks sufficient mental capacity to understand the nature and consequences of physical contact or sexual activity. Incapacity may arise from dementia, concussion, intoxication, unconsciousness, or similar impairment. The doctrine voids any purported agreement and removes consent as a defense to battery or rape.
Viola Volkov, an elderly woman with advanced dementia, arrived at the hospital disoriented and unable to recognize her daughter. Nurse Vance Vogel jokingly slapped her hand to demonstrate an IV site, and Volkov mumbled a weak reply. Because her impairment prevented understanding of the contact, the slap constituted battery despite the verbal response.
Vanessa Vega attended a live show two days after sustaining a concussion. Host Vincente Vukovic asked if she wanted to participate and she nodded slowly while appearing dazed. He then spun her repeatedly on stage. Her recent brain injury left her incapable of consenting, so the contact supported a battery claim.
Select any source to read its text and confirm it supports the definition.
Incapacity arises from dementia, concussion, intoxication, unconsciousness, or cognitive impairment that prevents understanding the nature and consequences of the contact. The Restatement and criminal law materials treat such conditions as voiding apparent consent.
Supporting sources
No. A weak verbal reply does not create effective consent if the speaker lacks capacity due to dementia or similar impairment. The MC question and essay answers confirm that capacity is a threshold requirement.
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A concussion two days earlier can impair cognitive processing and awareness, rendering a slow nod or dazed appearance insufficient for consent. The essay analysis shows that visible disorientation and delayed responses signal incapacity even without verbal objection.
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Yes. Court-appointed guardianship and policies requiring verbal consent or guardian approval supply objective evidence of impaired decision-making. Nonverbal cues alone cannot overcome that evidence when capacity is the threshold issue.
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…common law. [^maj-17]: Recognizing that the statutory rape law stemmed from traditional notions underlying the presumption of incapacity to consent, presuming that the male was responsible for the occurrence and the female was "too innocent and naive to understand the implications and nature of her act", in Hernandez, 61 Cal.2d at…