context: It is certain that Brian is a lion. Chances are about even that Mary went to the kitchen. It is unlikely that Sandra took the football. Chances are slight that if Sandra took the football, or Mary went to the kitchen, then Bernhard is a frog. It is highly unlikely that if either Brian is a lion, or Mary went to the kitchen, then Bill moved to the office. Chances are about even that if Mary went to the kitchen, or Sandra took the football, then Jessica is a wolf.
hypothesis: It is certain that sandra took the football, or Bernhard is a frog.
valid_hypothesis: It is probably not the case that sandra took the football, or Bernhard is a frog.
invalid_hypothesis: It is certain that sandra took the football, or Bernhard is a frog.
hypothesis_assertion: Sandra took the football, or Bernhard is a frog.