Hey WC, I still think, experientially that having psychosis is a unique experience (independent of diagnosis) and it affects people in unique ways so don't understand why some people with BP have psychosis and some do not, as a definitional matter.

It was not about BP 1 and BP 2. That is more understandable to me as one having mania and the other not, to be very brief. You can sort of imagine mania as a speeded up version of hypomania and most BP 1's also have that, as well as the depressions.

I do agree it is possible to crossover from one diagnosis to another. Probably I was BP II until I had a manic breakdown in my 40 s, just misdiagnosed.

I just think it is unwise to mix people with psychosis into the same diagnosis as people without it.