Mark Twain was the pen name of Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), was an American author and humorist most famous for his novel “The Adventures of Tom Sawyer” (1876) and its sequel “Adventures of Huckleberry Finn” (1885) (see: http://en.wikipedia.org/wiki/Mark_Twain ).
Mark Twain on lying by omission, “the silent lie” (1882): “An injurious lie is an uncommendable thing and so, also, and in the same degree, is an injurious truth--a fact that is recognized by the law of libel. Among other common lies we have the silent lie – the deception which one conveys by simply keeping still and concealing the truth. Many obstinate truth-mongers indulge in this dissipation, imagining that if they speak no lie, they lie not at all.” .
. Mark Twain (1882) , “On the Decay of the Art of Lying”: http://www.scribd.com/doc/522705/Semantikoncom-Presents-Mark-Twains-On-the-Art-and-decay-of-Lying-red-Letter-Edition .