4 ideas
9548 | A mathematical object exists if there is no contradiction in its definition [Waterfield] |
13160 | To exist and be understood, a multitude must first be reduced to a unity [Leibniz] |
13161 | Substances are everywhere in matter, like points in a line [Leibniz] |
9379 | A sentence is obvious if it is true, and any speaker of the language will instantly agree to it [Quine] |