 Rey (1992) suggests that introspection mistakes the lack of detail it delivers for the accurate representation of a simple ineffable property. Alternately or in addition (1995), having detected stable and identifiable complexes of involuntary responses to states of ourselves and to living creatures who look and behave like us, for example the commonsense causal, representational, conative and affective syndrome we lump together using the word ‘pain’, we project a simple quality onto the others and into ourselves. Rey and Pereboom each compare the projection of WIL properties into the mind by introspection to vision’s projection of simple homogeneous color properties onto environmental objects.