context: We doubt that Julius is a swan. There is a better than even chance that Mary left the football. Chances are slight that Fred went to the kitchen.
hypothesis: It is likely that julius is a swan, or Mary left the football.
valid_hypothesis: It is likely that julius is a swan, or Mary left the football.
invalid_hypothesis: It is highly unlikely that julius is a swan, or Mary left the football.
hypothesis_assertion: Julius is a swan, or Mary left the football.