thats probably very difficult to do, given all the different shapes, sizes and colours that cats come in. but you never know how they are doing it. if they have just spent 3 days storing up a bazillion million different pictures of cats, and compared each new one to them, then that's not really "thinking". it still hasnt got a clue what a cat is. its just found a picture that looks like what its looking at, and tagged it with 'cat'
what if you molded a cat out of a piece of stone. or carved one out of wood. would it still be able to recognise it as being a cat?