At 110nm I measured when a transistor was switching the second transistor on its output. I can prove it, can you disprove it?
A consistent 12Ghz signal cascade was (repeatedly) tested and confirmed on a 28nm asynchronous chip [1].
Why would it be impossible? [2].
We measure 800 Ghz and teraherz clocks on niobium superconducting Josephson Junctions [3,4,5].
[1] https://byrdsight.com/asynchronous-technology-has-its-time-f... ( See also on the slides in the video talk)
[2] "If an elderly but distinguished scientist says that something is possible, he is almost certainly right; but if he says that it is impossible, he is very probably wrong." - Arthur C. Clarke
[3] Ivan Sutherland Keynote Single Flux Quantum SFQ Ditigal Electronics Digital circuits totally distinct from Quan https://www.youtube.com/watch?v=KMVV3ErGSVY
[4] https://www.researchgate.net/profile/Jerome-Pety/publication...
[5] https://scholar.google.com/scholar?hl=en&as_sdt=0,5&qsp=3&q=...