Inasmuch as a proper solution is an exposure of a false deduction, showing on what kind of question the falsity depends, and since false deduction has a double use for it is used either if a false conclusion has been deduced, or if there is only an apparent deduction and no real one there must be both the kind of solution just described, and also the correction of a merely apparent deduction, so as to show upon which of the questions the appearance depends.