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∂AIL Professor Edsger W. Dijkstra↓Plataanstraat 5↓NL-4565 NUENEN↓The Netherlands∞
Dear Professor Dijkstra:

	Sorry about the spelling errors in the address.  Enclosed
is a corrected copy - easily produced since the letter is in the
computer, and I won't ask for typographical corrections of your
letters.

	Seriously, I think you don't allow enough for individual
variation.  Some of the greatest writers revise many times,
and others hardly revise at all.  Some good programmers structure
their programs elegantly, and others patch a lot.

.reg