Comment by stared

Well, "Is {sentence_a} similar to {sentence_b}?" is the correct query when we care about some vague similarity of statements. In this case, we should go with something in the line "Is {answer} a plausible answer to the question {question}".

In any way, I see how the example "Is {sentence_a} similar to {sentence_b}?" breaks the flow. The original example was:

    {question}
    
    # A
    
    {sentence_A}
    
    # B

    {sentence_B}

As I now see, I overzealously simplified that. Thank you for your remark! I edited the article. Let me know if it is clearer for you now.