3 ideas
5451 | Popper felt that ancient essentialism was a bar to progress [Popper, by Mautner] |
22352 | Out of more than a hundred planets, Earth is the only one with the idea of free will [Vonnegut] |
7634 | Icons resemble their subject, an index is a natural sign, and symbols are conventional [Peirce, by Maund] |