Full Idea
Despite their variety, each sense organ translates its stimulus into electrical pulses; rather than discriminating one type of input from another, the sense organs actually make them more alike.
Gist of Idea
Sense organs don't discriminate; they reduce various inputs to the same electrical pulses
Source
Rita Carter (Mapping the Mind [1998], p.174)
Book Reference
Carter,Rita: 'Mapping the Mind' [Phoenix 2000], p.174
A Reaction
An illuminating observation, which modern 'naïve realists' should bear in mind. Secondary qualities are entirely unrelated to the nature of the input, and are merely 'what the brain decides to make of it'. Discrimination is in our neurons.