I think &#x27;crank&#x27; may be overstating it.  His PhD is from MIT, and he&#x27;s been a full professor at UC Irvine for 25+ years, publishing pretty continuously.<p>While that certainly doesn&#x27;t mean he&#x27;s right -- plenty of people accept that Penrose is a genius who is wrong about certain ideas. I think dismissing this guy as a crank is not the best way to disagree.