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"In theory there is no difference between theory and practice; in practice there is."

January 1, 1970

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Added on April 10, 2026

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Non-fiction authors from the United States Presidential Medal of Freedom recipients People from St. Louis

Original Language: English

Sources

The earliest known appearance of this quote in print is Walter J. Savitch, Pascal: An Introduction to the Art and Science of Programming (1984), where it is attributed as a "remark overheard at a computer science conference". It circulated as an anonymous saying for more than ten years before attributions to Jan L. A. van de Snepscheut and Yogi Berra began to appear (and later still to various others).

https://en.wikiquote.org/wiki/Yogi_Berra

The earliest known appearance of this quote in print is Walter J. Savitch, Pascal: An Introduction to the Art and Science of Programming (1984), where it is attributed as a "remark overheard at a computer science conference". It circulated as an anonymous saying for more than ten years before attributions to Jan L. A. van de Snepscheut and Yogi Berra began to appear (and later still to various others).