| The Columbia World of Quotations. 1996. |
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| NUMBER: | 14266 |
| QUOTATION: | Theory can leave questions unanswered, but practice has to come up with something. |
| ATTRIBUTION: | Mason Cooley (b. 1927), U.S. aphorist. City Aphorisms, Seventh Selection, New York (1990). |
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| | | The Columbia World of Quotations. Copyright © 1996 Columbia University Press. |
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