context: Chances are about even that Brian is a frog. It is impossible that Julius is green. It is improbable that Mary went to the office. There is a very good chance that if either Julius is green, or Brian is a frog, then Greg is a rhino. We doubt that if either Julius is green, or Mary went to the office, then Sandra took the apple. It is certain that if Mary went to the office, and Julius is green, then Winona is a mouse.
hypothesis: It is improbable that brian is a frog, or Mary went to the office.
valid_hypothesis: There is a better than even chance that brian is a frog, or Mary went to the office.
invalid_hypothesis: It is improbable that brian is a frog, or Mary went to the office.
hypothesis_assertion: Brian is a frog, or Mary went to the office.