IBM Claims Quantum Advantage with New Validation Techniques

This part had me scratching my head:

"the researchers modified a popular approach for demonstrating quantum advantage called random circuit sampling, which was the basis of the first (since contested) claim of quantum advantage by Google in 2019. This involves running a randomly generated sequence of quantum gates on a quantum processor, recording the output and then getting a classical machine to replicate the results. If the classical machine can’t replicate the results, the argument goes, the quantum processor is doing something a classical machine is incapable of."

"The challenge is that if you can’t simulate the results, you also can’t check if the quantum processor is actually running the circuit you asked it to or just producing a jumble of noise. "

They just have it produce random quantum noise, but can't tell if it's the good kind of noise or the bad kind of noise?