> Why won't she be fooled? Because she has complete knowledge of all physical facts. Dennett is a physicalist, and to a physicalist, perception and experience

> Why won't she be fooled? Because she has complete knowledge of all physical facts. Dennett is a physicalist, and to a physicalist, perception and experience are physical processes. So Mary has complete knowledge of them. That includes complete knowledge of what she will experience in response to any physical stimulus. > Is it because she already knows that a banana has a different color than the sky and she knows the sky is light blue? That's one tiny piece of the physical facts that she knows, yes.