context: The front of the cafe must remain free of trash if customers are to be enticed to enter.
hypothesis: It is impossible that the doorway to the cafe is littered with trash and debris.
valid_hypothesis: It is impossible that the doorway to the cafe is littered with trash and debris.
invalid_hypothesis: Chances are about even that the doorway to the cafe is littered with trash and debris.
hypothesis_assertion: The doorway to the cafe is littered with trash and debris.