context: It is probably the case that Brian is white. Chances are about even that Mary took the football. There is almost no chance that Lily is green.
hypothesis: It is impossible that either Mary took the football, or Brian is white.
valid_hypothesis: Chances are about even that either Mary took the football, or Brian is white.
invalid_hypothesis: It is impossible that either Mary took the football, or Brian is white.
hypothesis_assertion: Either Mary took the football, or Brian is white.