CHAIRPERSON
Mr Hardien, if you're in a deserted building and you inspect a room and there's no-one there and then you leave it, you can expect, it will be reasonable to expect that in the next short period of time that room will remain empty, but if you're in a building where other people are - okay, you say you didn't check whether other people were there, but we know other people were there, you can look at a room and it's empty and you can walk away and then somebody can be in that room in three seconds time when you've gone.  In other words, the fact that when you look the room and it's empty doesn't mean it's going to stay empty for the next five minutes.