context: It is probable that Jessica is a mouse. We believe that Daniel is in the office. There is a very good chance that Sandra got the football. It is highly unlikely that if Sandra got the football, or Jessica is a mouse, then Lily is a rhino. It is improbable that if Daniel is in the office, or Sandra got the football, then Brian is gray. It is highly unlikely that if either Sandra got the football, or Jessica is a mouse, then Mary went to the garden.
hypothesis: It is likely that either Lily is a rhino, or Brian is gray.
valid_hypothesis: Chances are slight that either Lily is a rhino, or Brian is gray.
invalid_hypothesis: It is likely that either Lily is a rhino, or Brian is gray.
hypothesis_assertion: Either Lily is a rhino, or Brian is gray.