context: It is likely that Emily is a mouse. It is probably the case that Sandra took the football. Chances are about even that Mary went to the office.
hypothesis: Chances are slight that emily is a mouse, or Sandra took the football.
valid_hypothesis: It is highly likely that emily is a mouse, or Sandra took the football.
invalid_hypothesis: Chances are slight that emily is a mouse, or Sandra took the football.
hypothesis_assertion: Emily is a mouse, or Sandra took the football.