context: It is highly likely that John took the apple. Chances are about even that Mary moved to the garden. There is almost no chance that Lily is a lion. It is probably not the case that if Lily is a lion, and Mary moved to the garden, then Greg is a rhino. It is highly unlikely that if Mary moved to the garden, or John took the apple, then Julius is a swan. It is probably the case that if either John took the apple, or Lily is a lion, then Bill went to the bedroom.
hypothesis: It is highly likely that julius is a swan, or John took the apple.
valid_hypothesis: It is highly likely that julius is a swan, or John took the apple.
invalid_hypothesis: Chances are slight that julius is a swan, or John took the apple.
hypothesis_assertion: Julius is a swan, or John took the apple.