One may well ask how he gets these famous people to talk but listening to him, ploddingly introducing the same facts again and again, adding a bit here, then again the next time, you can guess what the effect on one of his "victims" would be. He only talks about what he knows plus a little bit about what he guesses. If you don't challenge his guesses but sound as though you know what he's talking about, he introduces one more little tit-bit, maybe intentionally including a false one. Eventually you fall silent or you become a waterfall of more information which he then tucks into his little kit-bag for use when he meets his next victim -- who may very well be somebody you name. Brilliant, relentless, and very effective. Eventually, when he lays it all out, he can just let the facts speak for themselves and that's more than eloquent enough.