Therefore , the President has eight legs. The conclusion has to be true, if the premises are true. So the argument is valid, even though it has false premises, not to mention a false conclusion. Form is what makes an argument valid. If an argument is valid, then the premises make the conclusion necessary .
Form makes an argument such that the premises make the conclusion necessary .
One can see whether the premises make the conclusion necessary just by looking at the form of the argument . That is why argument form is so important. Look, for example, at the following argument form. In fact, any argument that follows this form is valid. P. Now examine the following argument.