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 young man wearing a red bandanna at an event.
Hypothesis: The event is outdoors.
Update: The bandanna kept the young man dry when the rain started in the middle of the concert.

SOLUTION: strengthener

PROBLEM: Premise: Four people are wearing life jackets on a motorboat on still waters.
Hypothesis: The four people are about to compete in a fishing competition.
Update: None of the people have fishing rods.

SOLUTION: weakener

PROBLEM: Premise: Four individuals are outside on a patio, one man has raised his shirt over his head and another is holding a cellular phone.
Hypothesis: The people are having a conversation.
Update: The banter with each other back and forth teasing the topless man and the one  on the phone.

SOLUTION:
strengthener