The reality is that numerical anslysts want the computer do do exactly what they tell them to, in precisely the order described. Not at all. As far as we're c

The reality is that numerical anslysts want the computer do do exactly what they tell them to, in precisely the order described. Not at all. As far as we're concerned, it's just fine if the computer works by consulting an oracle. But we want the answers to be exactly the same as if the computer did what we told it to do. :-)