You actually can. Proof here: http://www.dwheeler.com/trusting-trust/

I was alluding to Ken being the author of the old, as well as one of the authors of the new compiler. In jest :)

You can. You just have to bootstrap all the way up.

What if any intermediate version is found to contain the violation of trusting trust? Every go maintainer has to build every version sequentially from that version to current version.