Why can a deductive argument have a valid form even when its premises are false?

In logic, a deductive argument is considered valid based solely on its form or structure, rather than the actual truth or falsity of its content in the real world.1

An argument is valid if it is impossible for the premises to be true while the conclusion is false. This means that the truth of the premises provides a logical guarantee for the truth of the conclusion. Because validity depends on this structural relationship, an argument can be valid even if its premises are false; the validity simply dictates that if the premises were true, the conclusion would necessarily follow.23451

To establish the truth of a conclusion, an argument must be both valid and have true premises, a condition known as soundness. However, logicians focus primarily on the validity of the inference form itself, as the determination of whether specific premises are true or false is typically the task of other disciplines or common observation.5