context: It is highly likely that Fred left the football. Chances are slight that Mary went to the office. It is probably not the case that Lily is a lion. It is impossible that if Lily is a lion, and Mary went to the office, then Sandra got the milk. It is probably the case that if either Fred left the football, or Lily is a lion, then Bill is in the school. It is probable that if Fred left the football, or Mary went to the office, then John took the apple.
hypothesis: There is little chance that lily is a lion, or John took the apple.
valid_hypothesis: We believe that lily is a lion, or John took the apple.
invalid_hypothesis: There is little chance that lily is a lion, or John took the apple.
hypothesis_assertion: Lily is a lion, or John took the apple.