context: It is certain that Emily is a mouse. It is probable that Julius is yellow. It is impossible that Jeff went to the office. It is certain that if Julius is yellow, and Jeff went to the office, then Lily is a swan. It is probably the case that if Julius is yellow, or Emily is a mouse, then Brian is a rhino. It is unlikely that if either Jeff went to the office, or Julius is yellow, then Bernhard is a lion.
hypothesis: It is almost certain that either Bernhard is a lion, or Jeff went to the office.
valid_hypothesis: Chances are slight that either Bernhard is a lion, or Jeff went to the office.
invalid_hypothesis: It is almost certain that either Bernhard is a lion, or Jeff went to the office.
hypothesis_assertion: Either Bernhard is a lion, or Jeff went to the office.