To assign complete knowledge to someone in a thought experiment like this is to open a can of worms that leads to counter-intuitive conclusions. The subjective

To assign complete knowledge to someone in a thought experiment like this is to open a can of worms that leads to counter-intuitive conclusions. The subjective experience of color vision is based on physical truths that extend beyond theory. If Mary truely possessed the knowledge of the receptor layout in her eyes, her exact neural layout, the composition of her specific signal substance soup, how a given input by extension would affect her emotional state etc. etc., she would be able to accurately foresee the impact of stepping out of that room. So, as the problem is phrased, she would not learn anything new. She would also be a god.