So this guy has founded multiple successful engineering-heavy companies, did not receive any actual financial support past 18 (despite inflated myths of an "emerald mine"), is attested by multiple skilled engineers, and has given videos where he talks in depth about engineering, but we're still looking for new & different kinds of evidence that he has skills?

Are we testing whether he knows anything at this point, or whether he's a literal Tony Stark? This thread started with discussion of whether he's any kind of engineer at all now we're looking for "rooms full of stumped geniuses" as if this was something every random engineer experienced.