"A few days ago I was doing something of no great interest to
anyone else, even me, and the thought struck me quite unexpectedly
that I knew the base business plan of all Linux companies."
"I was shopping in a local supermarket. What are the common
features of all supermarkets -- or all produce markets for that
"Would it surprise you if I said it was the fact that most of
their stock-in-trade is common to all supermarkets? In other words,
you can buy potatoes anywhere and they are still potatoes. You
might prefer a particular type of potato for your particular style
of cooking, but those potatoes can be bought at your local
supermarket, or another supermarket if your particular type isn't
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