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".

The woman upgraded her computer hardware, so she knew what she was doing
plausible

The clock stopped ticking, so I could get a good night's sleep
plausible

The pond froze over for the winter, so we didn't get to see it

not plausible