Answering questions affirmatively in the FEM will get you a higher score, hence answering questions negatively will in many cases lead to missing out on points. But, not in all cases.
Not all questions are scored questions. You can only miss out on points if you answer negatively to a scored question. Each question in each level in each section is weighted equally, that means that the maximum score that you can obtain for each question is the same in the respective section.
If you want to understand if a question is scored or unscored, please see the Applicability guidance here.
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