No, it isn't Logic. I'd like to think of it as practical philosophy which directs one to identify a problem and solve it by whatever means available. And I assure you, sometimes the solution doesn't make (logical) sense at all, but if it works it works.
So the research suggests that if you have something that is unreliable add to it another of its kind and gradually you'll increase reliability. I hope you see the potential problem here. To illustrate in different terms, by adding a small number to a small number you don't necessarily get a bigger number (-1+-1=-2); or add infinity to infinity and you still end up with infinity (although there are different magnitudes and one infinity can actually be "bigger" than another, but that's another story).