Those who don't know the difference are bound to make errors in there papers. I should never use the first person in my writing. Don't use contractions either. It's not formal 'nuff. I believe that, in my opinion, I think it is a mistake to keep kind of apologizing for maybe having an opinion about something, or perhaps even anything.
Man now considers it an affront to use exclusive language.
It's is not, it isn't ain't, and it's it's, not its, if you mean it is. If you don't, it's its. Then too, it's hers. It isn't her's. It isn't our's either.