[Justice is basically a less mean Sten. And also more magical. And also more concerned with a moral code that Alistair can actually understand. And also he doesn't breathe and he can read minds.

But other than that yes he's basically Sten.]

That makes no sense. Mortals wish to be lied to so that they are not themselves lying when they repeat the lies? [Setting aside the ethical concerns of love potions, OF WHICH THERE ARE MANY] Believing a lie will not change the fact that whatever fake potion a mortal has bought will not work when they use it.

[Justice is not buying this explanation.]