context: It is impossible that Mary dropped the milk. Chances are about even that Julius is a frog. It is unlikely that Emily is a sheep. We believe that if Julius is a frog, or Mary dropped the milk, then Bernhard is a frog. It is unlikely that if Julius is a frog, and Mary dropped the milk, then Sandra left the football. It is improbable that if Julius is a frog, or Emily is a sheep, then Greg is yellow.
hypothesis: There is a better than even chance that bernhard is a frog, and Emily is a sheep.
valid_hypothesis: It is highly unlikely that bernhard is a frog, and Emily is a sheep.
invalid_hypothesis: There is a better than even chance that bernhard is a frog, and Emily is a sheep.
hypothesis_assertion: Bernhard is a frog, and Emily is a sheep.