Full Idea
Jackson seems to imply that it isn't fair that all physicalist knowledge can be written down, but not all dualist knowledge can be.
Gist of Idea
Is it unfair that physicalist knowledge can be written down, but dualist knowledge can't be
Source
comment on Frank Jackson (What Mary Didn't Know [1986]) by John Perry - Knowledge, Possibility and Consciousness §7.5
Book Reference
Perry,John: 'Knowledge, Possibility and Consciousness' [MIT 2001], p.166
A Reaction
This pinpoints a problem for the 'Mary' example - that Mary's new sight of colour is claimed as 'knowledge', and yet the whole point is that it cannot be expressed in propositions (which seems to leave it as 'procedural' or 'acquaintance' knowledge).