context: A teacher is talking to a classroom full of children.
hypothesis: It is almost certain that a teacher is explaining the course of the day's lesson plans.
valid_hypothesis: Chances are about even that a teacher is explaining the course of the day's lesson plans.
invalid_hypothesis: It is almost certain that a teacher is explaining the course of the day's lesson plans.
hypothesis_assertion: A teacher is explaining the course of the day's lesson plans.