Informal Proof
De Morgan's theorem may be applied to the negation of a disjunction or the negation of a conjunction in all or part of a formula.
Read more about this topic: De Morgan's Laws
Famous quotes containing the words informal and/or proof:
“We are now a nation of people in daily contact with strangers. Thanks to mass transportation, school administrators and teachers often live many miles from the neighborhood schoolhouse. They are no longer in daily informal contact with parents, ministers, and other institution leaders . . . [and are] no longer a natural extension of parental authority.”
—James P. Comer (20th century)
“It comes to pass oft that a terrible oath, with a swaggering accent sharply twanged off, gives manhood more approbation than ever proof itself would have earned him.”
—William Shakespeare (15641616)