t. David Hume argued that it is possible to imagine one of these things without having experienced it by imagining a "missing" one.
The realist position with respect to these things has been defended by Byrne and Hilbert. C.L. Hardin has written many papers on them, as well as a book about them "for philosophers." A thought experiment developed by Frank Jackson imagines a woman named Mary who is an expert on these things but has never personally experienced them. To illustrate his "new riddle of induction," Nelson Goodman proposed that objects might change with respect to this property at a particular future time t. David Hume argued that it is possible to imagine one of these things without having experienced it by imagining a "missing" one. For 10 points, name these properties which are perceived by the cone cells of the retina.
The realist position with respect to these things has been defended by Byrne and Hilbert.
colors [prompt on sense perceptions; prompt on qualia; antiprompt on specific colors]