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What a misfortune it is that we should thus be compelled to let our boys' schooling interfere with their education!
Wrongly attributed
I have never let my schooling interfere with my education is one of the most-quoted lines attributed to Mark Twain and appears nowhere in his published work, letters or notebooks. The idea's earliest known appearance in this form is Grant Allen's, in 1894. Twain was alive and famous; the sentence was simply reassigned to him afterwards, as hundreds of others have been.