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".

Q: The man's eye became infected, so they decided to leave him out

A: not plausible
****
Q: We found empty seats in the theatre, so no more noise was created

A: not plausible
****
Q: It got dark outside, so we had to go downstairs

A:
plausible
****