premise: B. Dalton Bookseller (often called B. Dalton or B. Dalton's) was an American retail bookstore chain founded in 1966 by Bruce Dayton, a member of the same family that operated the Dayton's department store chain. B. Dalton expanded to become the largest retailer of hardcover books in the United States, with 798 stores at the peak of the chain's success.
hypothesis: Bruce Dayton was a member of a family that owned other stores besides the bookstore B. Dalton's.
reason: Bruce Dayton was a member of the family that founded Dayton's deparment store chain.