Thin Boundary

This thin characteristic makes researchers suspect "animals could think as we did" hehe. It's old story... they just about knew lately. Too late then, hehe. So don't be overestimate, since actuallly it's because the thin line was invisible.

The thin line? Animals cannot plan their own future experiences, whereas humans can.

So any pattern of behavior seen in animals in dealing with situations similar to humans (can be taught, can choose, can count blah blah blah), actually has limitations that are far from those of humans.