Use De Morgan's laws to write the negation of the statement.
The bread is stale and it is hard.
A)The bread isn't stale and it is hard.
B)The bread isn't stale and it is not hard.
C)The bread isn't stale or it is not hard.
D)The bread isn't stale or it is hard.

Question

Quizplus · Accepted Answer

Using De Morgan's laws, the negation of "The bread is stale and it is hard" is "The bread isn't stale or it is not hard." The negation switches the "and" to an "or" and negates both statements. Therefore, option C is the best choice. Using De Morgan's laws, we can rewrite the statement as "The bread is not (not stale or not hard)", which is equivalent to "The bread is not stale or it is not hard". Therefore, option C is the correct negation of the given statement.

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