But Michael... the mirror has neither 'idea' nor 'perception'. This conundrum has been linguistically juggled for decades, if not centuries, and the only way to deal with it is to realize that we, with our concepts and language are asking questions that physics has no problem with.

Ask yourself how you'd design a 'mirror' which WOULD give both types of reversal. What you are doing is assigning the name of 'right arm' to the one in the reflected version, as if it were another entity. The 'right arm' of the mirror entity IS your left arm. Nothing is backwards.