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What we know by experience, by abstraction, or empirically, are three distinct modes of knowing. Experiences are directly known and always true. (Experiences might reference other potentially false things, and might be false indirectly.)

That resolves the whole Mary knowledge problem. Books cannot inject that kind of direct knowledge. Thus the claim "mary knows everything" is either false, or only true for a smaller domain.

One can think of analogies, like tamper resistant logs, or unique CPU states while doing static analysis vs running a program.

All in all, the non-physicalist conclusions are widely overdrawn. More over, for what it is worth, Jackson himself no longer thinks this argument is a good one.