Uncertainty Principle. Quantum Mechanics. Observing results may change the results, Schroedinger's Cat, that sort of thing :-)
>BTW,
>
>Who's Heisenberg?
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John Koziol, ex-MVP, ex-MS, ex-FoxTeam. Just call me "X"
"When the going gets weird, the weird turn pro" - Hunter Thompson (Gonzo) RIP 2/19/05