4 ideas
| 22200 | If you eliminate the impossible, the truth will remain, even if it is weird [Conan Doyle] |
| 5987 | Alcmaeon was the first to say the brain is central to thinking [Alcmaeon, by Staden, von] |
| 2116 | The concept of an existing thing must contain more than the concept of a non-existing thing [Leibniz] |
| 24043 | Soul must be immortal, since it continually moves, like the heavens [Alcmaeon, by Aristotle] |