context: Chances are about even that Mary dropped the milk. There is little chance that Bernhard is a lion. There is a better than even chance that Brian is a frog. It is almost certain that if Brian is a frog, or Bernhard is a lion, then John put down the apple. It is highly likely that if Brian is a frog, and Bernhard is a lion, then Greg is a swan. It is probable that if Mary dropped the milk, and Brian is a frog, then Emily is a mouse.
hypothesis: Chances are about even that either Mary dropped the milk, or Bernhard is a lion.
valid_hypothesis: Chances are about even that either Mary dropped the milk, or Bernhard is a lion.
invalid_hypothesis: It is impossible that either Mary dropped the milk, or Bernhard is a lion.
hypothesis_assertion: Either Mary dropped the milk, or Bernhard is a lion.