>Ed
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>May I ask you a question. When you switch on the light in the morning, do you use your finger, your thumb, or some part of your hand? Whatever you use, how is it that your "thought" to turn on the light is translated to a complex movement of your hand to achieve the effect? Which muscles are used? Which nerves cause it?
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>In context of your need, it hardly matters. For a hand surgeon, it matters quite a lot.
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>Both viewpoints are valid. Only a very silly surgeon would say you are not as good as he at turning on lights because he knows and you do not.
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Absolutely; for day-to-day operations, I don't need detailed cpncious knowledge of the signalling mechanism or physiological mechanics of moving a finger. If I'm trying to design a system to emulate moving a finger, I'd better at least know the range of capabilities i have available to me. And what we do every day is design systems that model and emulate other activities, and we need to know how far we can push the envelope of our environment without designing a finger moving emulator that busts a nail every third time we use it.

>That such a person does not know about threads is not a liability, it is an opportunity for them to improve and learn if they are so inclined. But if there is no business reason to do so, perhaps they won't bother. Maybe they'd rather spend the time throwing sticks to the dog, or educating themselves another way reading Grant's anatomy about the flexor muscles in the forearm/hand.
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Actually, I have a copy of Gray's on the bookshelf...