 More recently, philosophers have also presented some arguments for one side or the other of this issue. Buller (2005, 50–52), for example, argues that behaviors cannot be adaptations because they are not heritable, whereas psychological mechanisms are. However, Buller’s discussion does not make the distinction between overt behaviors and behavioral strategies described above. Buller argues that behaviors could disappear from the population for generations if the necessary response conditions never arose, but yet still emerge again if the stimulus reappeared, and this suggests that these behaviors are not inherited as such rather than the underlying psychological mechanism. In this he is right as long as he means the overt behaviors; behavioral dispositions or strategies could also remain present and be inherited in the absence of the response conditions. Moreover, Buller’s description of a “psychological mechanism” in this context sounds rather like a behavioral disposition (2005, 52–53).