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."
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.