Because I
personally do not know it does not mean it's lost! (I
don't know how to extract nickel from ore, either, but has _that_
knowledge been lost? Hardly!)
Exactly just because you "know" how to do
something doesn't mean you
can do it. I know how to make a statue or a nice dining room table
but I lack the finer skill to actually do it.
Then I'd argue that you don't actually know how; you just know enough
that you could learn how with practice. (Or practise, in your case. :)
That's where the skills are being lost, these
things take practise.
The skills that are being lost are the ones that cannot be taught but
instead must be learned, by doing, and doing, and doing. Those skills
it is no great catastrophe to lose, because each person must relearn
them anyway, "lost" or not.
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