I think the
question boils down: Are we losing any knowledge as each
generation passes?
I would have to answer this with a resounding YES!
Me too. Who nowadays can knap a stone knife? hunt and kill game with
no weapon but a spear? make a bow, and arrows to go with it? make a
fire with a wood drill, or even flint and steel?
Or if you want skills less thoroughly lost, who can harness a yoke of
oxen for plowing? forge a plow? forge a sword?
Or even less so, who can ride a horse? do arithmetic on an abacus? use
the English subjunctive correctly?
...design vacuum-tube circuits?
John W. Campbell put it well in _Forgetfulness_.
An alternative question of course is...
"Does it matter if knowledge is lost as each generation passes?"
This gets much more complicated......
Does it matter? It better not, because knowledge _will_ be lost.
Perhaps ask instead "Which knowledge can we afford to lose?"....
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