Mr Benenson - I have never seen a in-depth review of his book by a "peer" (and have only had the book to look at for a few hours - I don't own a copy - yet) so would be interested if you can point to such a review. IMHO these usually will allow one to judge the "quality" of the authors reseach rather than the error you point out, which I agree is very annoying but common, block-headed ignorance being only one of a number of possible causes.