So, let's talk about Mary's Room. The thought experiment is this. Mary is a super-genius who likes to study the science of color vision.
Mary is a super-genius who likes to study the science of color vision. She reads a bunch of text books, internet sources, and academic papers about the subject, and even remotely performs her own experiments on color. Indeed, she is so great a scientist that she eventually learns everything there is no know about color and vision.
Indeed, she is so great a scientist that she eventually learns everything there is no know about color and vision. She knows all about pigments, how things appear a certain way based on the wavelengths of the photons that hit your eye, every minute detail about the eye and the signals that are sent to the brain, how the brain process the information, etc. Truly, as far as physics and biology go, she knows everything about color and vision.