context: There is almost no chance that Brian is a lion. It is impossible that Bernhard is a swan. It is likely that Mary went to the office. It is probably the case that if Bernhard is a swan, or Brian is a lion, then John discarded the milk. Chances are about even that if Bernhard is a swan, and Brian is a lion, then Lily is a frog. It is probably the case that if Mary went to the office, or Brian is a lion, then Greg is white.
hypothesis: Chances are about even that greg is white, or John discarded the milk.
valid_hypothesis: Chances are about even that greg is white, or John discarded the milk.
invalid_hypothesis: It is almost certain that greg is white, or John discarded the milk.
hypothesis_assertion: Greg is white, or John discarded the milk.