http://www.arch.cam.ac.uk/~pah1003/loe/Eng/Papers/AbstractsTalks/TalkAbstractHeggarty080514.pdf
"When reconstruction leads either to unhelpful concepts like `king',
or to other meanings more convenient for
their cultural constructs, linguistic palaeontologists pick and
choose. In the first case, they explicitly recognise
semantic uncertainty and retreat to the vaguer `ruler'; in the second,
they insist that the reconstruction could
only have meant their preferred `culturally strong' interpretation,
such as `wheel' (not just `turner'). They
cannot have it both ways; indeed their own logic can just as well be
turned upon its head. A number of their
supposedly key Indo-European technological reconstructions can in fact
be better explained by a scenario in
which the proto-language had already begun diverging before the
invention, not after it (Heggarty, May 2008).
M. Kelkar