My experience with cats is that they are definitely intelligent, in general, and are aware of a lot of things, but they generally just don't care.
One VERY unique kitten that I had, whenever he approached a mirror, or a glass door or window, would stand up on his hind legs and rapidly rub or "massage" the glass with both his front paws, like a puppy, as if trying to climb it or roll it open.
Sadly I never captured the act on camera and he died an unfairly early death that I took a long time to recover from.