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".

Q: the bartender refused to serve the patron because he refused to sign it

A: not plausible
****
Q: I wrote a thank-you note to my grandmother because i didn't know how to do it

A: not plausible
****
Q: the army surrendered the battle because they wanted to protect themselves

A:
plausible
****