context: It is unlikely that Sandra got the football. It is probably the case that Julius is a swan. It is likely that Julie is in the office.
hypothesis: It is certain that julius is a swan, and Julie is in the office.
valid_hypothesis: Chances are about even that julius is a swan, and Julie is in the office.
invalid_hypothesis: It is certain that julius is a swan, and Julie is in the office.
hypothesis_assertion: Julius is a swan, and Julie is in the office.