A Quote by Mark Twain on mark, twain, aint, know, and trouble

“It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so.” - Mark Twain

Mark Twain : American writer, pen name for Samuel Langhorne Clemens
Mark Twain (1835 - 1910)
Source: Mark Twain
Contributed by: Mary Ann Archibald. More quotes added by MaryAnn from all sources
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