context: It is probably the case that Bernhard is a rhino. It is highly unlikely that John picked up the apple. It is highly unlikely that Mary moved to the garden. We doubt that if Bernhard is a rhino, or Mary moved to the garden, then Lily is yellow. It is likely that if either Bernhard is a rhino, or John picked up the apple, then Greg is white. It is unlikely that if either John picked up the apple, or Mary moved to the garden, then Julius is white.
hypothesis: Chances are about even that either Lily is yellow, or Greg is white.
valid_hypothesis: Chances are about even that either Lily is yellow, or Greg is white.
invalid_hypothesis: There is almost no chance that either Lily is yellow, or Greg is white.
hypothesis_assertion: Either Lily is yellow, or Greg is white.