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 man is helping another man after a fall on the street.
Hypothesis: The man is his brother.
Update: The men look almost identical to each other.

SOLUTION: strengthener

PROBLEM: Premise: Various people out and about in a public place on an autumn day.
Hypothesis: A group of classmates out and about in public on an autumn day.
Update: There is a school bus parked nearby.

SOLUTION: strengthener

PROBLEM: Premise: A young woman is taking notes from a textbook.
Hypothesis: A woman is taking notes for her biology class from the textbook.
Update: The college student is taking notes from her history book.

SOLUTION:
weakener