5 ideas
15927 | Definition just needs negation, known variables, conjunction, disjunction, substitution and quantification [Weyl, by Lavine] |
21375 | Reason can be vicious, and great crimes have to be rational [Schopenhauer] |
21379 | Man's three basic ethical incentives are egoism, malice and compassion [Schopenhauer] |
467 | A virtue is a combination of intelligence, strength and luck [Ion] |
21376 | Philosophy treats animals as exploitable things, ignoring the significance of their lives [Schopenhauer] |