i don't know if is already in this way(because i played on TDM for a little) but i think it would be more realistic, if AI try to investigate on a door (open or closed) who is in a "wrong position".. if it has to be closed (because i forgot it), and AI find it open ..investigate and close it after if it has to be open (because i closed it in order to get the room dark, for example) , and AI find it close ..investigate and open it after even if AI don't investigate..i think they should put doors at the "beginning conditions"...more realistic