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".

I was confused by the professor's lecture, so I thought I'd ask here
plausible

The book was deemed inappropriate for children, so I had to sign off
plausible

I came upon a puddle on the sidewalk, so I didn't have to get up

not plausible