4 ideas
19404 | Necessities rest on contradiction, and contingencies on sufficient reason [Leibniz] |
4921 | Quantum states in microtubules could bind brain activity to produce consciousness [Penrose] |
7634 | Icons resemble their subject, an index is a natural sign, and symbols are conventional [Peirce, by Maund] |
19403 | Each of the infinite possible worlds has its own laws, and the individuals contain those laws [Leibniz] |