9 ideas
13342 | Carnap defined consequence by contradiction, but this is unintuitive and changes with substitution [Tarski on Carnap] |
13251 | Each person is free to build their own logic, just by specifying a syntax [Carnap] |
5987 | Alcmaeon was the first to say the brain is central to thinking [Alcmaeon, by Staden, von] |
23061 | Free atheism should start by questioning its faith in humanity [Gray] |
23057 | Gnosticism has a supreme creator God, giving way to a possibly hostile Demiurge [Gray] |
23056 | Judaism only became monotheistic around 550 BCE [Gray] |
23055 | Christians introduced the idea that a religion needs a creed [Gray] |
23058 | Buddhism has no divinity or souls, and the aim is to lose the illusion of a self [Gray] |
24043 | Soul must be immortal, since it continually moves, like the heavens [Alcmaeon, by Aristotle] |