18.11.4.1: reflects_same<T, T> is false for some Ts

[hubert-reinterpretcast]

reflect_same<T, T> is specified to be false when T reflects neither an alias nor an entity. This can happen with FunctionalTypeConversion meta-objects.

[camio]

Renamed from 'entity' to 'aspect'. Leaving open as an issue so further clarification can be made later.