Over the years of watching and working with John Tukey, I found many times he recalled the relevant information and I did not, until he pointed it out to me. Clearly his information retrieval system had many more “hooks” than mine did. At least more useful ones! How could this be? Probably because he was more in the habit than I was of turning over new information again and again, so his “hooks” for retrieval were more numerous and significantly better than mine were. Hence, wishing I could similarly do what he did, I started to mull over new ideas, trying to make significant “hooks” to
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