Babbage, Charles (1864). Passages from the Life of a Philosopher. Longman and Co. s. 67. OCLC258982. «On two occasions I have been asked, «Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?» ... I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question.»
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Quinion, Michael (5. november 2005). «Garbage in, garbage out». World Wide Words. Besøkt 26. februar 2012.