Nope - you can use mechanisms that requires a human to be in the loop -
people have been experimenting with that since 1994 at least. For example,
generate a graphic that must be typed in or use audio to say a word that
must be typed in.
David
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Dr. David H. Jameson
Founder and CTO, DigiPortal Software Inc.
"Winning isn't everything but losing isn't anything"
Irwin Cohen
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