context: It is impossible that John moved to the office. It is impossible that Julius is white. It is almost certain that Emily is a mouse. It is impossible that if Julius is white, or Emily is a mouse, then Greg is gray. Chances are slight that if Julius is white, or Emily is a mouse, then Lily is a lion. It is probably not the case that if either Julius is white, or John moved to the office, then Brian is a frog.
hypothesis: It is impossible that lily is a lion, and Brian is a frog.
valid_hypothesis: It is impossible that lily is a lion, and Brian is a frog.
invalid_hypothesis: Chances are about even that lily is a lion, and Brian is a frog.
hypothesis_assertion: Lily is a lion, and Brian is a frog.