8 ideas
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
11993 | Jones may cease to exist without some simple property, but that doesn't make it essential [Kung] |
11997 | A property may belong essentially to one thing and contingently to another [Kung] |
11992 | Aristotelian essences underlie a thing's existence, explain it, and must belong to it [Kung] |
11995 | Some peripheral properties are explained by essential ones, but don't themselves explain properties [Kung] |
11996 | Some non-essential properties may explain more than essential-but-peripheral ones do [Kung] |
5987 | Alcmaeon was the first to say the brain is central to thinking [Alcmaeon, by Staden, von] |
24043 | Soul must be immortal, since it continually moves, like the heavens [Alcmaeon, by Aristotle] |