One of the telling differences between cats and dogs is this:

Cats will behave with profound strangeness in private. Then they will suddenly revert to cat behavior if they are aware of being observed. Also: they know what your laughter means and many cats are insulted if you laugh at them.

Seriously. Set up private observation of a cat. Wait for the surprises that will probably follow. Which means that they not only know how to hide their own behavior… they relish doing so. Cats have a ‘private self’. A few dogs might be like this, but, in general?

Cats are actively masquerading.