context: It is likely that Julius is yellow. There is little chance that Lily is a frog. It is highly likely that Mary went to the garden. There is a very good chance that if either Lily is a frog, or Mary went to the garden, then Greg is a frog. Chances are about even that if Lily is a frog, and Mary went to the garden, then Fred is in the kitchen. It is improbable that if either Mary went to the garden, or Lily is a frog, then John discarded the milk.
hypothesis: There is a better than even chance that mary went to the garden, and Greg is a frog.
valid_hypothesis: There is a better than even chance that mary went to the garden, and Greg is a frog.
invalid_hypothesis: It is impossible that mary went to the garden, and Greg is a frog.
hypothesis_assertion: Mary went to the garden, and Greg is a frog.