The IEP defines Qualia as: “…the subjective or qualitative properties of experiences. What it feels like, experientially, to see a red rose is different from what it feels like to see a yellow rose. Likewise for hearing a musical note played by a piano and hearing the same musical note played by a tuba… As [C. I.] Lewis [the originator of the term] used the term, qualia were properties of sense-data themselves.