In an office building, there are three coworkers: Xavier, Yvonne, and Zach. Each has a personal coffee mug that they keep on their desks. Xavier's mug is white, Yvonne's is black, and Zach's is gray. One day, the cleaning crew comes in and accidentally swaps the mugs' locations. The next morning, Xavier arrives early and notices the mix-up but doesn't fix it. When Yvonne and Zach arrive, what will they think happened to their mugs? How does Xavier feel about the situation?

Respond very briefly.
Yvonne and Zach will likely think that their mugs were misplaced by someone else since they left them at their own desks the previous day. Without further information, they might assume that the cleaning crew, being the most likely to move items around while cleaning, made the mistake. Since people are generally accustomed to finding their personal belongings where they left them, Yvonne and Zach might be initially confused or surprised to see their mugs at different locations.

Xavier, after arriving early and noticing the mix-up without rectifying it, either feels indifferent to the situation, finding it unimportant enough to correct, or he may be slightly amused or interested to see how his coworkers will react upon discovering their mugs have been swapped. Alternatively, he might be in a hurry or preoccupied with other matters, choosing not to address the mug situation at that moment.