context: There is almost no chance that Emily is a mouse. We doubt that Brian is a frog. It is likely that Julius is a lion. There is a better than even chance that if Julius is a lion, and Emily is a mouse, then Bill dropped the milk. There is a very good chance that if Emily is a mouse, or Julius is a lion, then Bernhard is green. Chances are slight that if Julius is a lion, or Emily is a mouse, then John went to the kitchen.
hypothesis: Chances are about even that either John went to the kitchen, or Bernhard is green.
valid_hypothesis: Chances are about even that either John went to the kitchen, or Bernhard is green.
invalid_hypothesis: It is almost certain that either John went to the kitchen, or Bernhard is green.
hypothesis_assertion: Either John went to the kitchen, or Bernhard is green.