# Valid argument

From Conservapedia

A **valid argument**, in formal logic, one in which the conclusion is correctly derived from the premises. That is, a valid argument is one in which, if the premises are true, the conclusion must also be true. A valid argument whose premises are true is called a **sound argument**, and its conclusion must be true. A valid argument whose premises are not all true is called a **valid but unsound argument**, and its conclusion is not necessarily true.

A deductive argument is said to be valid when the inference from premises to conclusion is perfect. Arguments and Inference: truth and validity