4 ideas
14303 | Truth-functional conditionals have a simple falsification, when A is true and B is false [Peirce] |
12468 | A state of affairs is only possible if there has been an actual substance to initiate it [Pruss] |
2614 | Modern phenomenalism holds that objects are logical constructions out of sense-data [Ayer] |
2615 | The concept of sense-data allows us to discuss appearances without worrying about reality [Ayer] |