He claims that it does work.
You claim that it doesn’t work.
Both of you failing to prove your point, neither of your assertions can be seen as having been scientifically proven.
Even if the odds are 9,999,999,999,999,999,999 to 1 that you are correct, there is still no definitive proof that you are.
That being the case, it bothers me when folks who have degrees in engineering/physics jump to conclusions.
Look around the room you are in, the building you are in, the vehicle you drive, the garage at home. At some point in time, one person thought the devices found in those places were possible. Almost everyone else said they weren’t.
I'll take those odds. Life is never certain.