| 23310 | Animals live by sensations, and some have good memories, but they don't connect experiences [Aristotle] |
| 23300 | Aristotle and the Stoics denied rationality to animals, while Platonists affirmed it [Aristotle, by Sorabji] |
| 4270 | Do we use reason to distinguish people from animals, or use that difference to define reason? [Scruton] |
| 4914 | A frog will starve to death surrounded by dead flies [Carter,R] |