premise: Two boys run to the entryway of an old building. hypothesis: A couple of children are eating popsicles at a birthday party.
contradiction: You cannot be in an old building and at a birthday party at the same time.|contradiction: The children must be either at an old building or a birthday party.|contradiction: One cannot both run to the entryway of an old building (in transit) while already in attendance at a birthday party, eating popsicles.