[gonzus]

Probably by Fred Brooks, as summarized by Guy L. Steele Jr in https://dreamsongs.com/ObjectsHaveNotFailedNarr.html:

> Fred Brooks, in Chapter 9 of The Mythical Man-Month, said this: Show me your flowchart and conceal your tables, and I shall continue to be mystified. Show me your tables, and I won't usually need your flowchart; it'll be obvious. That was in 1975. Eric Raymond, in The Cathedral and the Bazaar, paraphrased Brooks' remark into more modern language: Show me your code and conceal your data structures, and I shall continue to be mystified. Show me your data structures, and I won't usually need your code; it'll be obvious.