  As in the Red Barn Example, discussed in Section 1.1, here one has to deal with two justifications for a true statement, one of which is  correct and one of which is not. Let \(B\) be a sentence  (propositional atom), \(w\) be a designated justification  variable for the wrong reason for \(B\) and \(r\) a  designated justification variable for the right (hence factive)  reason for \(B\). Then, Russell’s example prompts the following  set of   assumptions[7]:  