Not clear at all and addressed by the parameters of the thought experiment. Remember that Mary has near omnipotent knowledge of light and vision. She would clea

Not clear at all and addressed by the parameters of the thought experiment. Remember that Mary has near omnipotent knowledge of light and vision. She would clearly be able to interpret the color of the door with her expertise of light refraction, density, etc. She would "know" the door is red without having "seen" red.