context: It is certain that Sandra got the football. It is certain that John left the apple. It is probably the case that Greg is a frog. It is probably the case that if Greg is a frog, or Sandra got the football, then Emily is a cat. It is probable that if Greg is a frog, and John left the apple, then Brian is yellow. There is a very good chance that if Greg is a frog, and John left the apple, then Julius is a lion.
hypothesis: It is probable that greg is a frog, or Brian is yellow.
valid_hypothesis: It is probable that greg is a frog, or Brian is yellow.
invalid_hypothesis: There is almost no chance that greg is a frog, or Brian is yellow.
hypothesis_assertion: Greg is a frog, or Brian is yellow.