I think they'll reluctantly admit it if pressed, but not early in exchanges as it's easy to see why they would think the surface-level reader (like me) would quickly dismiss their arguments without a deeper understanding. So they tend to see it as FUD that less researched people fire off at them without really knowing what they're talking about. My take, anyway. I've found several of them to be pretty good faith arguers if you get a bit further into the weeds with them, and I always learn something new from the exchanges.

show me who denied it and where please.

I hope you don't forget to include to the last Bitcoin as well.