First, let me note that she isn't talking yet.
But Ray, at 9 1/2 months, has entered the world of language. She knows what a word means, and that word is "kitty."
She probably has a good idea about "no," too, but she won't admit it :)
I got her to search the house for the cat a couple of days ago. Kind of cruel, since Fafnir was outside, but there you go.