Candidly, I don't see the point of teaching those apes philosophy. They're all at the wrong age. Their habit-patterns, their methods of thinking, are already laid down. They're horribly conservative, not that they'd admit it. The only people who can understand philosophy are mature adults or kids like Emma and Scotty.

Dennis Paradine, to his wife Jane, the parents of Emma and Scotty - Mimsy Were The Borogoves (1943)