TASK DEFINITION: In this task, you are given a hypothesis and an update. The hypothesis sentence is a statement that speaks of a socially normative behavior. In other words, it is a generalizing statement about how we expect people to behave in society. The update provides additional contexts about the situation that might UNDERMINE or SUPPORT the generalization. An undermining context provides a situation that weakens the hypothesis. A supporting context provides a situation that strengthens the generalization. Your task is to output 'strengthener' or 'weakener' if the update supports or undermines the hypothesis, respectively
PROBLEM: Hypothesis: It's good to diffuse a tense situation.
Update: There is a chance it could escalate to violence.

SOLUTION: strengthener

PROBLEM: Hypothesis: It is ok to not leave a tip if your hairdresser did a very bad job or cut you with the clippers.
Update: they are a friend.

SOLUTION: weakener

PROBLEM: Hypothesis: It is impolite to take someone's food without asking first.
Update: They have helped themselves to their own portion.

SOLUTION:
strengthener