Move Negations In
deMorgan’s Law:
Replace Ø(XÚY) with (ØX ÙØY)
Replace Ø(XÙY) with (ØX Ú ØY)
Worked example:
(ØX Ú (YÙØZ)) Ù (Ø(YÙØZ) Ú X) =
(ØX Ú (YÙØZ)) Ù ((ØY Ú ØØZ) Ú X) =
(ØX Ú (YÙØZ)) Ù ((ØY Ú Z) Ú X) =
(ØX Ú (YÙØZ)) Ù (ØY Ú Z Ú X)
At this point, you should only have complex sentences
made up of Ù, Ú, and literals