context: We doubt that Brian is a frog. It is probably the case that Mary went to the kitchen. There is a very good chance that John took the milk.
hypothesis: Chances are slight that brian is a frog, or John took the milk.
valid_hypothesis: There is a very good chance that brian is a frog, or John took the milk.
invalid_hypothesis: Chances are slight that brian is a frog, or John took the milk.
hypothesis_assertion: Brian is a frog, or John took the milk.