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: This is a man walking near a busy street.
Hypothesis: The man is walking because they don't have a car.
Update: The man is walking to increase the number of steps monitored by his activity device.

SOLUTION: weakener

PROBLEM: Premise: A bird's eye view of people walking up and down cement steps, most in silhouette except for two little girls.
Hypothesis: The girls are best friends.
Update: The girls are arguing.

SOLUTION: weakener

PROBLEM: Premise: A waitress in a black T-shirt and black shorts at Cafe Mambo serves a tray of beverages to a seated customer in a red tank top and black bandanna.
Hypothesis: The customer has ordered a soda and a glass of water.
Update: The waitress sets down two full glasses in front of the customer.

SOLUTION:
strengthener