context: It is certain that Sandra left the milk. It is impossible that Bernhard is a swan. It is highly unlikely that Lily is a frog. Chances are about even that if Lily is a frog, and Bernhard is a swan, then Mary picked up the apple. It is probably not the case that if Sandra left the milk, and Lily is a frog, then John went to the garden. It is probably not the case that if Sandra left the milk, or Bernhard is a swan, then Julius is yellow.
hypothesis: It is unlikely that sandra left the milk, or Lily is a frog.
valid_hypothesis: It is certain that sandra left the milk, or Lily is a frog.
invalid_hypothesis: It is unlikely that sandra left the milk, or Lily is a frog.
hypothesis_assertion: Sandra left the milk, or Lily is a frog.