Full Idea
If parts of the brain are gradually replaced, perhaps by silicon chips, ...the most reasonable hypothesis is that qualia do not fade at all.
Gist of Idea
Why should qualia fade during silicon replacement?
Source
David J.Chalmers (The Conscious Mind [1996], 3.7.3)
Book Reference
Chalmers,David J.: 'The Conscious Mind' [OUP 1997], p.259
A Reaction
As it stands this could either assert dualism or functionalism. Personally I think the most reasonable hypothesis is that qualia would fade. Chalmers needs more imagination (or less?). What is it like to experience Alzheimer's Disease?