4 ideas
10594 | Henkin semantics is more plausible for plural logic than for second-order logic [Maddy] |
18256 | Quantity is inconceivable without the idea of addition [Frege] |
9831 | Geometry appeals to intuition as the source of its axioms [Frege] |
18033 | The meaning of a representation is its role in thought, perception or decisions [Block] |