What kind of twisted logic is that? Come on, Chief. Your smart enough to know the problem with that assumption. Who is going to sign the petition? If I get a petition in the mail and I agree with it I'll sign it and send it. If I disagree, I'll throw it out. So if 1,000,000 petitions were mailed wouldn't you assume that the people who didn't respond did not agree with the petition?
The petition itself is confusing. Did the the people sign because they were against Kyoto or because they do not accept AGW?

But my whole point was that without knowing the methodology or total mailings, the number "19,000" is meaningless. If I show you a petition signed by 19,000 soldiers against the Iraq War will that change your mind and will you call for a troop withdrawal? If I show you a petition for keeping abortion legal signed by 19,000 doctors will you be pro-choice?

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Es ist nichts schrecklicher als eine tätige Unwissenheit.

Johann Wolfgang von Goethe