context: It is highly unlikely that Greg is a swan. There is a very good chance that John went to the kitchen. It is unlikely that Daniel is in the garden. We doubt that if Daniel is in the garden, and John went to the kitchen, then Gertrude is a mouse. Chances are about even that if John went to the kitchen, and Daniel is in the garden, then Lily is green. It is likely that if either Daniel is in the garden, or Greg is a swan, then Mary moved to the office.
hypothesis: It is improbable that greg is a swan, or Lily is green.
valid_hypothesis: It is improbable that greg is a swan, or Lily is green.
invalid_hypothesis: It is highly likely that greg is a swan, or Lily is green.
hypothesis_assertion: Greg is a swan, or Lily is green.