12 ideas
| 21962 | Metaphysics is the roots of the tree of science [Descartes] |
| 2661 | Dialectic is speech cast in the form of logical argument [Cicero] |
| 3659 | I know the truth that God exists and is the author of truth [Descartes] |
| 2673 | There cannot be more than one truth [Cicero] |
| 2669 | Dialectic assumes that all statements are either true or false, but self-referential paradoxes are a big problem [Cicero] |
| 3657 | Understanding, not the senses, gives certainty [Descartes] |
| 2664 | If we have complete healthy senses, what more could the gods give us? [Cicero] |
| 2665 | How can there be a memory of what is false? [Cicero] |
| 20800 | Every true presentation can have a false one of the same quality [Cicero] |
| 468 | Musical performance can reveal a range of virtues [Damon of Ath.] |
| 2672 | Virtues must be very detached, to avoid being motivated by pleasure [Cicero] |
| 3660 | Atheism arises from empiricism, because God is intangible [Descartes] |