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Never more pertinent than now:

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Those who practice relativism do not considerably seek to improve or correct their epistemic judgements and so rational reflec­tion and dis­course become not only pointless for them, but also impossible for them. 
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In every instance the possibility of rational thought or advancement towards actual comprehension necessarily requires that there are grounds for distinguishing good or bad, relevance or irrelevance, truth or lies. 
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By denying that requirement,  relativism also precludes reason itself.
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