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: The man is driving his equipment under the archway.
Hypothesis: The sad man is driving his equipment under the archway.
Update: The man just got a promotion at work.

SOLUTION: weakener

PROBLEM: Premise: A dog with black and white spots walks on the beach, looking behind itself.
Hypothesis: The animal is alone.
Update: The beach is totally silent.

SOLUTION:
strengthener