Even if one does not believe in DID, that doesn't make everything truth or lies! That's not even close to the richness of experience for people who are not DID!

There's no such thing as a true or false perspective. If I say and believe the sky is green, then it's green for me! No one except myself can say it is not. The only problem with it being green is that 99.9999999999999% of people have "agreed" that it's blue. So, it becomes a problem for me communicating with others and dealing with the 82.7% of the people who have a problem with my being allowed to see and call it green.

If you do not know in any way, shape or form that it is "supposed to be" blue, then it cannot be a lie (I spent a zillion years seeing it as green but knowing everyone else saw it blue so toed the party line as well as I could and talked about blue; a whole different sort of problem; now I can talk better about how I see it without needing to cave to the party). If your green alter is out, then it's green.