In this task, you will be given two sentences separated by "because". You should decide whether the first sentence can be the result of the second sentence. If you can see a possible cause and effect relationship, answer with "plausible", otherwise answer with "not plausible".

the boy's mouth stung because he couldn't remember his own name
not plausible

the inside of the train went dark because it was cold
not plausible

the boy's mouth stung because he doesn't know what he's doing

not plausible