Why is Mary's case problematic for physicalists?

Question

Quizplus · Accepted Answer

Mary's case, often referred to as "Mary the color scientist," is problematic for physicalists because it suggests that there are aspects of reality (such as the subjective experience of color) that cannot be fully explained by physical facts alone. When Mary, who has only ever experienced the world in black and white, sees color for the first time, she learns something new (what it's like to experience color), which cannot be reduced to physical information she already had. This challenges the physicalist view that everything about the mind and the world can be explained in purely physical terms.

Why Is Mary's Case Problematic for Physicalists