This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.
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I just find it a bit circular that you want evidences for the assertion saying that assertions need evidences.
That is not what circular means. If I say, "All claims need supporting evidence," then I am being inconsistent if I cannot provide evidence for that claim. Circular would be, "All claims require evidence. We know this, because without evidence, you cannot make a proper claim."