4 ideas
18758 | Validity is provable, but invalidity isn't, because the model is infinite [Church, by McGee] |
16721 | Changes in secondary qualities are caused by changes in primary qualities [Giles of Orleans] |
4042 | Metaphysics requires the idea of people (speakers) located in space and time [Davidson] |
4041 | Sentences held true determine the meanings of the words they contain [Davidson] |