Talking back already?!?

Here's the Hannah story of the week!  I think she's already learned how to talk back!

She was sitting in the high chair the other day at lunch saying bye bye to her food and tossing it over the edge of the tray. (I guess my cooking's not quite as good as I thought!)  I caught her doing it and told her "no, no!"  She looked at me, grinned, and said "yeah!"  and kept doing it.  I thought it was just a coincidence, but later on she got into something else (I think it was the garbage can) and I told her no, only to have her respond over and over again with "yeah!"   She is too smart.