According to Jackson, one can have all the physical information without having all the information there is to have.

Question

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Jackson's famous knowledge argument, also known as Mary's Room thought experiment, argues that even if someone had complete physical information about the experience of seeing color, they would still lack the knowledge of subjective experience or qualia of actually experiencing color themselves. Therefore, one can have all the physical information without having all the information there is to have.

According to Jackson, One Can Have All the Physical Information