context: It is certain that Bernhard is a lion. Chances are slight that Greg is a frog. There is a very good chance that Sandra left the football. There is almost no chance that if Bernhard is a lion, and Sandra left the football, then Mary dropped the milk. We doubt that if either Greg is a frog, or Bernhard is a lion, then John went to the kitchen. It is probably not the case that if Greg is a frog, and Sandra left the football, then Lily is a swan.
hypothesis: We believe that john went to the kitchen, or Greg is a frog.
valid_hypothesis: It is probably not the case that john went to the kitchen, or Greg is a frog.
invalid_hypothesis: We believe that john went to the kitchen, or Greg is a frog.
hypothesis_assertion: John went to the kitchen, or Greg is a frog.