The man who does not read has no advantage over the man who cannot read.

We searched the standard Twain corpus for this line — the University of California Press editions of his works and letters, the Mark Twain Project archive, and curated collections of authenticated Twain sayings — and found no book, essay, letter, notebook entry, speech, or interview in which he uses this exact wording. The most rigorous investigation we consulted traces the attribution to Twain only in 1914, years after his death, and turns up an earlier thematic cousin in an 1862 issue of "The American Phrenological Journal" ("A man may read, and yet, in a certain sense, not be educated..."), but that is a different sentiment, not the finished aphorism, and it names no rival author. The line does surface repeatedly in print — for instance in Keith J. Kelley's "The Myth and Magic of Library Systems" (2015) and in "The Routledge Handbook of Philosophy of Well-Being" (2015) — yet in each case it is simply credited to Twain without any underlying documentation, which reflects popular repetition rather than a primary source. The sentiment fits Twain's well-known advocacy for reading and libraries, which likely explains why the attribution stuck, but fit is not proof. Crucially, we found no citable competing author and no datable instance of this precise wording predating Twain, so there is no basis to call this misattributed; the failure to locate a Twain source only leaves it unconfirmed, not disproven. This is a quote very widely credited to Mark Twain but unsupported by any primary source: attributed.