Use De Morgan's laws to write the negation of the statement.
-Cats are lazy or dogs aren't friendly.
A)Cats aren't lazy and dogs are friendly.
B)Cats aren't lazy or dogs aren't friendly.
C)Cats aren't lazy or dogs are friendly.
D)Cats are lazy and dogs are friendly.

Question

Quizplus · Accepted Answer

De Morgan's laws state that the negation of a disjunction (or) is the conjunction (and) of the negations. Thus, the negation of "Cats are lazy or dogs aren't friendly" is "Cats aren't lazy and dogs are friendly."

Use De Morgan's Laws to Write the Negation of the Statement