premise: Nabokov's Congeries was a collection of work by Vladimir Nabokov published in 1968 and reprinted in 1971 as "The Portable Nabokov". Because Nabokov supervised its production less than a decade before he died, it is useful in attempting to identify which works Nabokov considered to be his best, especially among his short stories.
hypothesis: "The Portable Nabokov" was supervised by Nabokov 7 years before he died.
reason: 7 years is less than a decade but may still not be correct.