Full Idea
The idea that 'qualia' exist but are causally inert is difficult to sustain: for if they are causally inert, how can we even know about them?
Gist of Idea
If qualia are causally inert, how can we even know about them?
Source
E.J. Lowe (Introduction to the Philosophy of Mind [2000], Ch. 3)
Book Reference
Lowe,E.J.: 'Introduction to the Philosophy of Mind' [CUP 2000], p.59
A Reaction
The brain might be a special case. I can't know about a 'causally inert' object in my kitchen, but I might know about it if in some way I AM that object. Personally, though, I think everything that exists is causally active.