context: Chances are about even that Bernhard is a rhino. It is highly unlikely that John took the milk. It is probably the case that Sandra got the football.
hypothesis: It is likely that either Sandra got the football, or John took the milk.
valid_hypothesis: It is likely that either Sandra got the football, or John took the milk.
invalid_hypothesis: It is highly unlikely that either Sandra got the football, or John took the milk.
hypothesis_assertion: Either Sandra got the football, or John took the milk.