‘Lies, damned lies, and statistics‘ is a phrase describing the persuasive power of numbers, particularly the use of statistics to bolster weak arguments. It is also used colloquially to doubt statistics cited to prove an opponent’s point.
The phrase derives from the full sentence, ‘There are three kinds of lies: lies, damned lies, and statistics.’ It was popularized by Mark Twain and others, who mistakenly attributed it to the British prime minister Benjamin Disraeli. The true originator is uncertain, but it has, at times, been attributed to an anonymous writer in mid-1891 and later that year to English politician Sir Charles Dilke.
Twain popularized the saying in ‘Chapters from My Autobiography,’ published in the ‘North American Review’ in 1907. ‘Figures often beguile me,’ he wrote, ‘particularly when I have the arranging of them myself; in which case the remark attributed to Disraeli would often apply with justice and force: ‘There are three kinds of lies: lies, damned lies, and statistics.”
Attribution of the saying likely derives from earlier expressions regarding legal witness, where it takes forms relating liars, damned liars, and experts. That phrase is found in the science journal, ‘Nature,’ in 1885: ‘A well-known lawyer, now a judge, once grouped witnesses into three classes: simple liars, damned liars, and experts. He did not mean that the expert uttered things which he knew to be untrue, but that by the emphasis which he laid on certain statements, and by what has been defined as a highly cultivated faculty of evasion, the effect was actually worse than if he had.’
The earliest instance of the phrase that includes the reference to statistics that is found in a letter written in the British newspaper ‘National Observer’ in 1891: ‘Sir, —It has been wittily remarked that there are three kinds of falsehood: the first is a ‘fib,’ the second is a downright lie, and the third and most aggravated is statistics. It is on statistics and on the absence of statistics that the advocate of national pensions relies…’
The Daily Omnivore 
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