context: It is impossible that Sandra got the football. Chances are about even that Greg is a rhino. It is improbable that Lily is a lion.
hypothesis: It is highly unlikely that greg is a rhino, and Lily is a lion.
valid_hypothesis: It is highly unlikely that greg is a rhino, and Lily is a lion.
invalid_hypothesis: It is certain that greg is a rhino, and Lily is a lion.
hypothesis_assertion: Greg is a rhino, and Lily is a lion.