To what extent can we discern different colours? What of this power is merely relational (a light blue, a lighter blue)? Have studies been done to determine if our "resolution of discernment" (a particular distance in nanometers of which we can differentiate two visual wavelengths with unaided vision)? What's the difference between how we speak of colour, how we conjure it up in its particularity in our imagination, and how we differentiate it through experience? [more inside]
posted by ageispolis on Oct 31, 2008 - 13 answers

What's an easy-to-read introduction to ethics? [more inside]
posted by agentofselection on Mar 4, 2008 - 10 answers