Gedolim in general are not wont to make claims about their natures, accomplishments or abilities. I have no doubt that their Neshomas are colorful 3-dimensional entities compared to my grey 1-dimensional dark existence.
I have no doubt the Chofetz Chaim, the Steipler, Rav Elyashuv and many others were and are aware of the world in far-reaching ways I cant imagine. I cant prove this to you.