Consider a mobile application which for some reason needs to prevent drunk users from using it (e.g. to avoid dreaded "drunk dials" or "drunk texts"). How could "sober authentication" be executed from a human interaction point of view?
There must be a balance between usability of such applications for sober users while providing some mechanism to protect against the "drunk dialing" problem.
Please additionally consider that there also could be elderly or disabled people who may act slower and less precisely similar to how a drunk acts. An accessible app would need to accommodate them as well.
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