context: Chances are slight that Daniel left the football. It is probably the case that Julius is green. There is a very good chance that Lily is a frog. There is little chance that if either Lily is a frog, or Julius is green, then Sandra took the milk. It is improbable that if Daniel left the football, and Julius is green, then Mary moved to the garden. There is a better than even chance that if Julius is green, and Lily is a frog, then Greg is a rhino.
hypothesis: It is likely that either Greg is a rhino, or Julius is green.
valid_hypothesis: It is probably not the case that either Greg is a rhino, or Julius is green.
invalid_hypothesis: It is likely that either Greg is a rhino, or Julius is green.
hypothesis_assertion: Either Greg is a rhino, or Julius is green.