context: It is likely that Mary is in the park. We doubt that Greg is a frog. There is a very good chance that Lily is a lion. We believe that if either Mary is in the park, or Lily is a lion, then Sandra got the football. It is unlikely that if Greg is a frog, and Lily is a lion, then Julius is green. Chances are about even that if either Lily is a lion, or Greg is a frog, then John went to the garden.
hypothesis: It is highly unlikely that sandra got the football, and Greg is a frog.
valid_hypothesis: It is highly unlikely that sandra got the football, and Greg is a frog.
invalid_hypothesis: Chances are about even that sandra got the football, and Greg is a frog.
hypothesis_assertion: Sandra got the football, and Greg is a frog.