So, if I were to oversimplify it, I could say that Iris and Kiritsugu's HS forms are beings specific to singularities beyond reality and existence itself?
On the other hand, this isn't a thread about whether or not it's possible, it's about what would happen if it happened anyway. Just because there is no reality in which 2+2=pepper doesn't mean we can't think about the concept. Not that there would be much point in that example.