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 in a red shirt riding a bike.
Hypothesis: A boy is riding a bike to school.
Update: It is a lovely Sunday afternoon.

SOLUTION: weakener

PROBLEM: Premise: Girl walking her horse across the street.
Hypothesis: The horse has a saddle on his back.
Update: The girl is taking the horse to a barn for the night

SOLUTION: weakener

PROBLEM: Premise: A young boy screams on a roller coaster.
Hypothesis: A boy and his family are on a roller coaster.
Update: The parents rented the entire park out for his birthday

SOLUTION:
strengthener