We would be engineering a conception of the mind that closes the gap between the physical and the mental, that is, between the fully functioning and responsive visual system in the brain and the apparently superadded ‘subjective’ qualia of colour experience. Such a piece of engineering would be a vindication of Leibniz’s position. Subjective colour experience becomes not just a queer addon, but the inevitable, rationally explicable, expression of the kinds of physical functioning of the creatures that we are.
