Full Idea
Apparently it is just a fact of biology that organisms that have consciousness have, in general, much greater powers of discrimination than those that do not.
Gist of Idea
Conscious creatures seem able to discriminate better
Source
John Searle (The Rediscovery of the Mind [1992], Ch. 4.III)
Book Reference
Searle,John R.: 'The Rediscovery of the Mind' [MIT 1999], p.108
A Reaction
This presupposes knowledge of which creatures are conscious. Clearly colour vision gives more information than monochrome vision. But presumably a computer could process more visual information than I could see. It doesn't have a fovea centralis.