4 ideas
527 | Everything exists which anyone perceives [Metrodorus of Chios] |
2596 | Maybe mind and body are parallel, like two good clocks [Leibniz] |
8693 | An 'abstraction principle' says two things are identical if they are 'equivalent' in some respect [Boolos] |
2595 | If the universe is a perfect agreement of uncommunicating substances, there must be a common source [Leibniz] |