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Sheffer stroke. In Boolean functions and propositional calculus, the Sheffer stroke denotes a logical operation that is equivalent to the negation of the conjunction operation, expressed in ordinary language as "not both". It is also called non-conjunction, or alternative denial[ 1] (since it says in effect that at least one of its operands is ...
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Sheffer is a surname, and may refer to: Alla Sheffer, Israeli-Canadian computer scientist; Craig Sheffer (born 1960), American actor; Daniel Sheffer (1783–1880), U.S. congressman; Doron Sheffer (born 1972), Israeli basketball player; Henry M. Sheffer (1882–1964), American logician; Hogan Sheffer (born 1958), American screenwriter
The crosswords are designed to increase in difficulty throughout the week, with the easiest on Monday and the most difficult on Saturday. [6] The larger Sunday crossword, which appears in The New York Times Magazine, is an icon in American culture; it is typically intended to be a "Thursday-plus" in difficulty. [6]
The post 30 Printable Crossword Puzzles to Test Your Smarts appeared first on Reader's Digest. Show comments. ... Daily downpours to mar outdoor plans in the Southeast this week, but also bring ...
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Sheffer was a Polish Jew born in the western Ukraine, who immigrated to the USA in 1892 with his parents and six siblings. He studied at the Boston Latin School before entering Harvard University, learning logic from Josiah Royce, and completing his undergraduate degree in 1905, his master's in 1907, and his Ph.D. in philosophy in 1908.
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