context: It is unlikely that Mary went to the garden. There is a better than even chance that Sandra got the football. Chances are about even that Bernhard is a lion.
hypothesis: Chances are about even that either Mary went to the garden, or Bernhard is a lion.
valid_hypothesis: Chances are about even that either Mary went to the garden, or Bernhard is a lion.
invalid_hypothesis: It is almost certain that either Mary went to the garden, or Bernhard is a lion.
hypothesis_assertion: Either Mary went to the garden, or Bernhard is a lion.