TASK DEFINITION: In this task, you are given a premise, a hypothesis, and an update. The premise sentence describes a real-world situation and is always assumed to be true. The hypothesis sentence describes an assumption or inference that you might make about that situation having read the premise. The update provides additional information about the situation that might weaken or strengthen the hypothesis. A weakener is a statement that weakens the hypothesis, that is, it makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis, that is, it makes you much more likely to believe the hypothesis is true. Your task is to answer with 'strengthener' or 'weakener' if the update strengthens or weakens the hypothesis, respectively.
PROBLEM: Premise: A man stands at a microphone, reading from a sheet of paper at an outdoor event.
Hypothesis: A man giving an important speech to his co-workers.
Update: The members of the audience are all wearing caps and gowns.

SOLUTION: weakener

PROBLEM: Premise: A city block is sealed off by the police.
Hypothesis: People can not access the city block.
Update: The block is completely empty and there are policemen guarding barriers around the block.

SOLUTION: strengthener

PROBLEM: Premise: A bald man wearing all black waits for the subway and so does another man who is leaning on a pillar.
Hypothesis: The two men are waiting to go home.
Update: The man in black is holding a broom and dust pan.

SOLUTION:
weakener