Likewise, an argument cannot be called true or false , only valid or invalid . Only arguments are valid or invalid, and only statements are true or false. Validity is the term we use when we mean to say that an argument is logical. The term soundness , however, is a term that refers both to the form and the content of an argument. It is applied to an argument to say something about both its truth and its validity.
Truth means the correspondence of a statement to reality.
An argument is valid when its conclusion follows logically from its premises. The term soundness is used to indicate that all the premises in an argument are true and that the argument is valid. An argument can contain true premises and still be invalid. But if an argument is sound, its premises must be true and it must be valid. An argument contains several components.