context: It is probably the case that Lily is a rhino. It is highly unlikely that Brian is a swan. It is probably the case that Greg is a lion. It is highly unlikely that if either Lily is a rhino, or Greg is a lion, then Julius is green. Chances are slight that if Lily is a rhino, or Brian is a swan, then Emily is a cat. It is highly unlikely that if Greg is a lion, or Brian is a swan, then John left the football.
hypothesis: It is certain that either John left the football, or Emily is a cat.
valid_hypothesis: Chances are slight that either John left the football, or Emily is a cat.
invalid_hypothesis: It is certain that either John left the football, or Emily is a cat.
hypothesis_assertion: Either John left the football, or Emily is a cat.