Ah, now I remember where I saw something similar long time ago: False Proofs, Classic Fallacies, http://mathforum.org/dr.math/faq/faq.false.proof.html (got "permission denied" error when trying to post the URL as a link).

In reply to Re^4: Meaning Of error in perl by Anonymous Monk
in thread Meaning Of error in perl by grewal7634

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