Full Idea
The richness in information of perceptual experience outruns our modes of description of it, which has led some philosophers to claim that the content of perceptual experience is non-conceptual.
Gist of Idea
If perception is much richer than our powers of description, this suggests that it is non-conceptual
Source
Tim Crane (Elements of Mind [2001], 5.45)
Book Reference
Crane,Tim: 'Elements of Mind' [OUP 2001], p.151
A Reaction
It certainly implies that it can't be entirely conceptual, but it still may be that in humans concepts are always involved. Not when I'm waking up in the morning, though.