That is not a debunking... That's someone running a similar experiment and getting a different result. That would debunk the claim that Teslas can never detect

That is not a debunking... That's someone running a similar experiment and getting a different result. That would debunk the claim that Teslas can never detect a painted wall. It does not debunk the claim that Teslas will sometimes fail to detect a painted wall. And in a safety-critical system, the distinction is not mere pedantry.