by Claude Opus 5.5
Wertheimer argues that the validity conditions for consent are set by the consequences of different principles, not discovered. What would a consequence-sensitive account say about a capacity threshold for intoxicated sex in a group?
Alan Wertheimer’s Consent to Sexual Relations (2003) rejects the idea that the conditions under which consent is valid can be read off from the concept of consent or from facts about the will. Whether a token of consent is “morally transformative” depends on whether we have good reason to adopt a principle of valid consent that treats it as such. Those reasons are, at bottom, about consequences: the costs and benefits, for all affected, of treating a given class of tokens as valid or invalid. This does not make Wertheimer a crude consequentialist about individual acts. His claim concerns the justification of principles, and the relevant consequences include the value of autonomy, the harms of unwanted sex, and the costs of error in both directions.
This framework is well suited to the intoxication problem because it reframes the question. We stop asking where capacity “really” ends and ask instead which threshold, applied as a general principle, would be best.
The structure of the choice
A capacity threshold is a rule that classes some intoxicated tokens of consent as valid and others as invalid. Any such rule produces two kinds of error. A threshold set too high, requiring near-sobriety, treats as invalid many tokens that reflect what the person genuinely wanted and would endorse, and so frustrates autonomy and stigmatises ordinary conduct. A threshold set too low, requiring only consciousness, validates tokens that the person would repudiate and that do not reflect any capacity to protect her own interests, and so permits serious harm.
The consequence-sensitive approach asks how these errors should be weighed. Several factors bear on the answer: the relative magnitude of the harms, their frequency, the ability of the parties to avoid error at low cost, and the effect of the principle on behaviour.
Wertheimer’s own leanings
Wertheimer was notably cautious about treating intoxication as invalidating. He took seriously the value of allowing people to make choices while drinking, observed that many people use alcohol precisely to lower inhibitions, and was wary of rules that would make large amounts of ordinary sexual activity non-consensual. He suggested that voluntarily induced intoxication short of severe impairment need not defeat consent. Critics have found this too permissive. The interesting question is whether that permissiveness follows from his method or only from the particular weights he assigned.
Applying the method to a group setting
The method itself does not fix the weights, and a group setting changes them substantially.
First, the magnitude of harm from false positives rises. Validating an impaired token in a group setting risks not one unwanted encounter but several, along with the distinct harms of exposure and degradation before others. The downside of error is larger.
Second, the value protected by validating marginal tokens falls. The autonomy argument for a low threshold appeals to the importance of letting people make their own choices, including choices to have sex while drinking. That interest is real in a two-person encounter between people who know each other. It is much weaker in an encounter whose structure, involving several partners, unfamiliar space and an audience, makes it unlikely that an impaired token expresses a stable preference.
Third, the cost of avoiding error is low for those proceeding and is shared among them. Any one of several people can stop the encounter or check the other person’s state. A principle requiring clear capacity places a modest burden on each.
Fourth, the incentive effects differ. A low threshold in group settings creates incentives to bring about or exploit intoxication, since the resulting tokens will count. A high threshold removes that incentive. Wertheimer’s approach is sensitive to this kind of strategic effect.
Fifth, the epistemic position of the parties matters. In a group, each participant may rely on others’ judgement, and the reliability of signals of agreement is lower. A principle should be calibrated to what can realistically be verified.
What the consequence-sensitive account recommends
Taken together, these considerations suggest a threshold that varies with setting. In a two-person encounter between people with an existing relationship, a moderate threshold may be justified: tokens given under mild or moderate intoxication can be treated as valid unless there are clear signs of incapacity. In a group setting, the same method recommends a substantially higher threshold, under which tokens given under any significant impairment are treated as invalid and the burden of ensuring clear capacity falls on those proceeding.
This conclusion is attractive in that it explains a widely shared intuition, that group sex involving an intoxicated person is especially suspect, without positing a mysterious metaphysical difference in what consent is. It is also a conclusion the consequentialist method reaches even if one starts with Wertheimer’s own relatively permissive weights for ordinary cases.
Objections
One objection is that a setting-sensitive threshold is unpredictable and so unfair to defendants. The reply is that criminal law already uses context-sensitive standards of reasonableness, and that the relevant feature, the presence of several participants, is easy to identify.
A deeper objection is that the consequentialist method makes the validity of consent contingent in a way that fails to respect persons. On a rights-based view, whether I have consented is a fact about me, not about the social utility of rules. Wertheimer’s answer is that this objection mistakes the level of analysis: our concept of a right itself has to be specified, and its boundaries are drawn partly by considering the consequences of drawing them in different places. Whether that answer succeeds is one of the central questions a seminar on this text should press.
A further question
If the threshold should vary with setting, should it vary with other features too: age, prior relationship, the method of intoxication? A consequence-sensitive account invites this proliferation, and part of assessing it is deciding whether the resulting complexity is a cost or an accurate reflection of moral reality.