I recall thread in which someone posed a moral problem they had already decided on, to see what others would do in their situation. I follow suit with the issue of promises (Vague to protect the innocent):
Two promises were made, let's call them A and B. Both were made sincerely and both with the full intent of keeping them. Promise A was made several months before promise B, but both were fairly major promises (No, you don't get to find out what they were). However, a few more months down the line, circumstances have resulted that make each promise mutually exlcusive - keeping A would mean breaking B, and vice versa.
So, as the subject - what would you do?