it is not like people have not proven thing in the past, lead manager for security research at google, who has observed the new work from a distance. but usually the methods and technologies, the formalism that were developed for creating the proofs, were so esoteric and so specific to the problem that there was basically hardly any chance that threr would be repeat work that built up on it. But i can say for certain that adam's stuff with coq, and sparation logic,this is stuff that's going to get built on and applied in many fifferent domains. That's what's soexeciting.