  Imagine two experiences: first, an experience (call it ‘\(e_{1}\)’) of a blue triangle next to a red square; second, an experience \((e_{2})\) of a red triangle next to a blue square. \(e_{1}\) has color qualia \(Q_{B}\) and \(Q_{R}\), and also “spatial qualia”, which we can label ‘\(Q_{Tr}\)’ and ‘\(Q_{Sq}\)’. The reference of these four bits of qualia terminology (‘\(Q_{B}\)’, ‘\(Q_{R}\)’, ‘\(Q_{Tr}\)’, and ‘\(Q_{Sq}\)’) has been fixed by, respectively, experiences of blue objects, experiences of red objects, experiences of triangles, and experiences of squares. \(e_{2}\), of course, also has \(Q_{B}, Q_{R}, Q_{Tr}\), and \(Q_{Sq}\). Yet \(e_{1}\) and \(e_{2}\) differ phenomenologically, and therefore differ in qualia. So more qualia terminology is required: in particular, a quale name whose reference is fixed by experiences of blue triangles and red squares, and another name whose reference is fixed by experiences of red triangles and blue squares. In a useful notation, the first quale name is ‘\(Q_{Rx \amp Sq(x) \amp By \amp Tr(y)}\)’,  and the second is ‘\(Q_{Rx \amp Tr(x) \amp By \amp Sq(y)}\)’.  Obviously further qualia names with ever-more complicated subscripts will be needed.