This is a really sweeping statement. Some animals like jellyfish or corals do not have brains. Even if they are sometimes responsive to their environment, is th

This is a really sweeping statement. Some animals like jellyfish or corals do not have brains. Even if they are sometimes responsive to their environment, is that "perception"? Even if you think the answer is "yes", I hope you can see that it's not a trivial or obvious conclusion, and an unqualified statement about "all animals" may not be warranted.