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Your point being...? The sentence you quoted is, in fact, in active
voice. If the sentence were in passive voice, it would read something
like "It has been demonstrated by experimental evidence...." See the
difference? If you're going to argue points of grammar, I'd suggest you
learn your grammar first.
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Stephen P. Victor svictor -at- lgc -dot- com
Landmark Graphics Corporation svictor -at- compassnet -dot- com
15150 Memorial Drive http://www.cda.ulpgc.es/steve.html
Houston, TX 77079 USA De gustibus non disputandum est
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