Your excerpt is from a Professor Enigma at
TalkOrigins Archive - Feedback for January 2000. It's a long page, you'll have to search for the excerpt.
Tim Thompson's answer right below it seems fine. He doesn't bother addressing any of Professor Enigma's misrepresentations, just states the true purpose of Miller's experiment.
Anyone can say whatever they like, especially on the Internet. What makes you think much of what Professor Enigma says is accurate?
--Percy