TASK DEFINITION: In this task, you will be given two sentences separated by ", so". You should decide whether the first sentence can be the cause of the second sentence. If you can see a possible causation, answer with "plausible", otherwise answer with "not plausible".
PROBLEM: The authorities vowed to protect the identity of the crime victim, so they decided to leave

SOLUTION: not plausible

PROBLEM: I held the door for the woman entering behind me, so she couldn't get out

SOLUTION: not plausible

PROBLEM: I rubbed the soap between my hands, so I could wash my hands

SOLUTION:
plausible