the cool dogs are spelled dawg and they're bipeds

Does a cool cat know he's cool?

Who coined the term "cool cat"?
Why come up with a term anyway? One look at dogs and you'll never be able to simply say "cat" anyway. [*]

[*] dogs are more likely to be met making it thus more cost effective to add "cool" to "cat" than "lame, disgraceful, desperate for attention and needy" to "dog".
Oh, wait... they replaced that with "playful".