context: Chances are slight that John got the milk. We believe that Julius is a rhino. Chances are slight that Fred left the football. It is likely that if John got the milk, or Fred left the football, then Mary went to the park. It is highly unlikely that if either Fred left the football, or John got the milk, then Brian is white. It is improbable that if Fred left the football, or John got the milk, then Greg is a lion.
hypothesis: There is almost no chance that brian is white, or Greg is a lion.
valid_hypothesis: There is almost no chance that brian is white, or Greg is a lion.
invalid_hypothesis: There is a better than even chance that brian is white, or Greg is a lion.
hypothesis_assertion: Brian is white, or Greg is a lion.