Final answer:
The negation of a statement can be expressed by adding the qualifier "not" or by combining the original statement and its negation to create a contradiction.
Step-by-step explanation:
The negation of a statement is the denial of that statement. The easiest way to express the negation of a statement is to add the qualifier "not". For example, the negation of the statement "My dog is on her bed" is "My dog is not on her bed". Another way to express the negation of a statement is through contradiction, where a statement and its negation are combined, resulting in a contradiction. For example, "My dog is on her bed" and "My dog is not on her bed" are contradictory statements.