3 ideas
| 15549 | If it were true that nothing at all existed, would that have a truthmaker? [Lewis] |
| Full Idea: If there was absolutely nothing at all, then it would have been true that there was nothing. Would there have been a truthmaker for this truth? | |
| From: David Lewis (A world of truthmakers? [1998], p.220) | |
| A reaction: This is a problem for Lewis's own claim that 'truth supervenes on being', as well as the more restricted truthmakers invoked by Armstrong. |
| 14781 | A 'belief' is a habit which determines how our imagination and actions proceed [Peirce] |
| Full Idea: A cerebral habit of the highest kind, which will determine what we do in fancy as well as what we do in action, is called a 'belief'. | |
| From: Charles Sanders Peirce (What is a Leading Principle? [1880], I) |
| 11052 | Psychological logic can't distinguish justification from causes of a belief [Frege] |
| Full Idea: With the psychological conception of logic we lose the distinction between the grounds that justify a conviction and the causes that actually produce it. | |
| From: Gottlob Frege (Logic [1897] [1897]) | |
| A reaction: Thus Frege kicked the causal theory of justification well into touch long before it had even been properly formulated. That is not to say that there is no psychological aspect to logic, because there is. |