context: It is probably the case that Julius is a lion. Chances are about even that Sandra got the football. It is impossible that Yann is tired. It is highly likely that if Sandra got the football, or Julius is a lion, then Brian is yellow. It is certain that if Sandra got the football, and Yann is tired, then John put down the milk. It is almost certain that if either Sandra got the football, or Julius is a lion, then Jeff went to the garden.
hypothesis: It is highly unlikely that julius is a lion, or Brian is yellow.
valid_hypothesis: There is a very good chance that julius is a lion, or Brian is yellow.
invalid_hypothesis: It is highly unlikely that julius is a lion, or Brian is yellow.
hypothesis_assertion: Julius is a lion, or Brian is yellow.