context: There is little chance that Mary went to the garden. It is probably the case that Lily is a swan. It is unlikely that Brian is gray.
hypothesis: It is improbable that brian is gray, or Lily is a swan.
valid_hypothesis: We believe that brian is gray, or Lily is a swan.
invalid_hypothesis: It is improbable that brian is gray, or Lily is a swan.
hypothesis_assertion: Brian is gray, or Lily is a swan.