Lots of laws to pick from depending on the jurisdiction, e.g. see https://www.quora.com/If-you-sign-a-contract-while-drunk-or-otherwise-intoxicated-is-it-still-

Lots of laws to pick from depending on the jurisdiction, e.g. see https://www.quora.com/If-you-sign-a-contract-while-drunk-or-otherwise-intoxicated-is-it-still-legally-binding https://www.quora.com/If-you-sign-a-contract-while-drunk-or-... > what is the threshold... Far past the threshold is glaringly obvious, far below as well. If it is close, you do what is always done about any threshold question.