context: There is a very good chance that Winona is a mouse. Chances are about even that Greg is a lion. It is unlikely that Mary is in the garden. It is almost certain that if either Greg is a lion, or Mary is in the garden, then Jessica is a sheep. It is highly unlikely that if Winona is a mouse, or Greg is a lion, then Sandra left the apple. There is a very good chance that if Winona is a mouse, and Mary is in the garden, then Julius is a swan.
hypothesis: It is probable that julius is a swan, and Mary is in the garden.
valid_hypothesis: It is improbable that julius is a swan, and Mary is in the garden.
invalid_hypothesis: It is probable that julius is a swan, and Mary is in the garden.
hypothesis_assertion: Julius is a swan, and Mary is in the garden.