Reddings guide illegal participation

[Mike L]

Well then, what do you do if said OOB receiver leaps near the sideline and swats the ball away from an inbounds B who is about to intercept the ball? You still have an A who has gone OOB, he still has merely leaped and not returned, so must still be OOB per your "ruling" and therefore all you have is an incomplete even if it prevents a B from catching the ball. Or does the reasoning change according to how the play works out and by what rule do you justify a changing ruling depending on the outcome of the play?