Yeah, right. Post references to their work. The "debunking" studies have themselves been debunked and have been shown to be flawed (when they weren't outright frauds, like the initial MIT work (which was shown to have actually generated excess heat, but which HAD THE DATA ALTERED to depict the reverse)).
Instead of talking to your "friends", I suggest you spend some time actually studying the experimental works. Ed Storms book is a very good place to start.
The usual treatment. “My so-called friends did all this debunking somewhere, some time, somehow, so I get to display all kinds of ignorance of the facts on the ground.”
Voodoo Science.