I'd turn that around and say that Searle is making a pretty bizarre leap suggesting that intelligence is
restricted to C,H,O,N based lifeforms. specific atoms having some kind of hidden link to higher level human function, sounds like homeopathy to me
given that
self aware,
conciousness and
living are badly defined, if defined at all, the turing test is the best we've got. in that case we could do it in a coupla years at most, if we decided it was worth doing. it may well be possible now, I havent checked recently

by accident, by machines that are designed only to do work for us (like the bulk of machines we build) then 50yrs+. consider the moon landings, they happened because we arbitrarily decided it was worth doing, at great cost and fairly limited benefit. when do you think the first moon landing would have been if we left it entirely up to consumer market forces?