Cats usually strut around with an unamused expression suggesting they know better than you. But then you get out a laser pointer and realize "Oh right ... they're not superior beings from another dimension sent here to judge our innermost souls. Appearances can be deceiving." But because we know how impossible it is to teach cats tricks, when we see them doing something clever — like these smart cats that appear to play fetch, write research papers and use smartphones — we know it's their own brilliant idea. And we can only guess what they're thinking!
A smarter cat knows how to make his owner start playing fetch with him. (Drop toy in lap, then stare.)