context: It is improbable that Mary is in the office. It is highly unlikely that Bill got the milk there. It is highly unlikely that Julius is a swan. There is almost no chance that if either Julius is a swan, or Mary is in the office, then Greg is a frog. It is likely that if Bill got the milk there, and Mary is in the office, then John went to the bedroom. It is almost certain that if Bill got the milk there, and Mary is in the office, then Bernhard is yellow.
hypothesis: It is highly unlikely that greg is a frog, or Bill got the milk there.
valid_hypothesis: It is highly unlikely that greg is a frog, or Bill got the milk there.
invalid_hypothesis: There is a better than even chance that greg is a frog, or Bill got the milk there.
hypothesis_assertion: Greg is a frog, or Bill got the milk there.