This philosopher conceded that moral standards could be exploited by a “sensible knave” who broke the rules without being caught. This philosopher denounced ascetic habits like “celibacy, fasting, [and] penance” as “monkish virtues” that served no purpose. This (15[1])philosopher, who illustrated the concept of convention with the example of rowing a boat, was characterized as the progenitor of (*) “quasi-realism” by Simon Blackburn. This philosopher quipped that it was not irrational to “prefer the destruction of the whole world to the pricking of [his] little finger.” In his first book, this philosopher characterized reason as the “slave of the passions” and claimed it was impossible to derive an “ought” from an “is.” For 10 points, name this Scottish Enlightenment philosopher who wrote A Treatise of Human Nature. ■END■