The non-mathematical answer, or at least one of them is Alice still has 5 ice cubes, because she was out on a date with Bob, and when he ordered his drink he wanted to show Alice how much of a man he was and asked to have the bartender only put in 3 ice cubes in his drink.

When looking for solutions, the more clear the question, the more clear the answer. I agree, I do not think any math model can capture all the things that go into a human decision. People just do not think the same as the person that is sitting right next to them, they do not see the same things the person sitting right next to them see either.