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 boy doing a trick in the air on his bicycle
Hypothesis: A boy doing a trick is laughing.
Update: The boy is straight-faced.

SOLUTION: weakener

PROBLEM: Premise: A woman talks to her friends while sitting in a restaurant.
Hypothesis: The restaurant is serving Mexican food.
Update: They couldn't read the French menu.

SOLUTION: weakener

PROBLEM: Premise: A woman is standing near the water, looks to be throwing something.
Hypothesis: The woman is skipping rocks.
Update: The woman is looking for turtles.

SOLUTION:
weakener