context: It is improbable that Mary dropped the milk. There is little chance that Bernhard is a frog. We believe that Bill moved to the office. It is probably not the case that if Bernhard is a frog, and Bill moved to the office, then Daniel left the football. It is probably not the case that if either Bill moved to the office, or Bernhard is a frog, then Julius is a rhino. Chances are about even that if either Mary dropped the milk, or Bill moved to the office, then John grabbed the milk.
hypothesis: We doubt that either Daniel left the football, or Bill moved to the office.
valid_hypothesis: We believe that either Daniel left the football, or Bill moved to the office.
invalid_hypothesis: We doubt that either Daniel left the football, or Bill moved to the office.
hypothesis_assertion: Either Daniel left the football, or Bill moved to the office.