I think a lot of the work-related things are random and determining likes and dislikes, so we'll probably need lots more attempts on this to prove it but I haven't seen those theories before! Great tips

As for the plates, I see them as individual meals for each person since they all have their own glasses set out which means they have their places and don't walk over to the other plates. You could be right though, it may have been designed to be serving plates since there are only 4 of them after all.