context: There is a very good chance that Brian is a frog. Chances are slight that Daniel left the football. There is little chance that Greg is green. There is a better than even chance that if either Brian is a frog, or Daniel left the football, then Emily is a mouse. It is unlikely that if Greg is green, or Brian is a frog, then Bill went to the office. Chances are slight that if either Greg is green, or Brian is a frog, then Mary discarded the milk.
hypothesis: It is likely that either Daniel left the football, or Bill went to the office.
valid_hypothesis: It is probably not the case that either Daniel left the football, or Bill went to the office.
invalid_hypothesis: It is likely that either Daniel left the football, or Bill went to the office.
hypothesis_assertion: Either Daniel left the football, or Bill went to the office.