3 ideas
17699 | Variables are auxiliary notions, and not part of the 'eternal' essence of logic [Schönfinkel] |
13007 | Archimedes defined a straight line as the shortest distance between two points [Archimedes, by Leibniz] |
15788 | Syntax and semantics are indeterminate, and modern 'semantics' is a bogus subject [Quine, by Lycan] |