There is a guy who lives above me that has a mental illness. I have no idea what kind of illness it is. Where I live mental illness is a huge taboo and it goes untreated.
He lives on the floor above me, and everyday, you can hear him talking to himself, and he also does different voices. Sometimes he sounds like a man, and sometimes he sounds like a woman and he argues with himself. However, what he says is complete gibberish. I cant understand his language very well, but my husband told me that what he says actually makes no sense in their language.
I think if he was staying there for a few days and was unmedicated, depending on severity people would probably notice something off about him. When I see this man outside my home, hes talking to himself. I could tell when I met him he was a bit off.
Not to say there is anything wrong with mental illness, and I do wish that guy could get some treatment for his condition. Just giving my experience.