In my fourth year of my PhD on schizophrenia and I'm currently writing up my thesis. I'm procrastinating right now so thought I'd do something useful with what I've been studying.
And no, schizophrenia is not multiple personality disorder.
Edit: I have to get dinner and run some errands. I'm really enjoying this so I will definitely get back and answer the rest of the questions.
not op or an expert but this is absolutely incorrect. Plenty of people with schizophrenia are cognizant of their condition. These people are conflating "schizophrenic" with "in the midst of a psychotic episode". And even within a psychotic episode you can retain a (variable) degree of lucidity.
What /u/death said is correct.