  One way to identify coercive threats is by looking for a distinctive way that pressure can affect a coercee's will. Sometimes, a use of threats conditioned on the agent's activities may affect not just the coercee's choice but also her ability to choose at all. Under severe psychological pressure, faced with grave dangers or significant evils, people sometimes react in ways that diverge from (or at least do not follow from) their more rational, considered desires. Harry Frankfurt seems to make this effect a requirement for something to count as coercive, saying “A coercive threat arouses in its victim a desire — i.e. to avoid the penalty — so powerful that it will move him to perform the required action whether he wants to perform it or considers that it would be reasonable for him to do so” (Frankfurt 1988 [1973], 78). Frankfurt has several reasons for insisting on this strong requirement, but perhaps most central is his view that coercion must have such an overbearing effect if it is to override the coercee's moral responsibility for acting (Frankfurt 1988 [1973], 75–76). However, if one treats such overburdening as a sufficient condition for coercion, then this again lends support to the view that some offers — irresistible ones — will also turn out to be coercive. Though the fact that Q's will was overborne would seem compatible with the claim that Q has been coerced, few besides Frankfurt have taken such overburdening to be a necessary condition for coercion to take  place.[14]