Full Idea
In some animals the perception is retained, and in some not. Without retention knowledge is impossible. Some animals go further and form an account based on the perception. This leads to memory and experience, and so to either skill or understanding.
Gist of Idea
Animals may have some knowledge if they retain perception, but understanding requires reasons to be given
Source
Aristotle (Posterior Analytics [c.327 BCE], 99b35-)
Book Reference
Aristotle: 'Posterior Analytics (2nd ed)', ed/tr. Barnes,Jonathan [OUP 1993], p.73