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Originally Posted by Lune
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What control group are you using to highlight the cause of global warming, that you can't use for anthropogenic global warming?
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There is no control group, ergo you cannot know the cause inductively. We know the earth has gotten warmer over the past 150 years, we just don't know why.
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Originally Posted by Lune
Think about this: Watson, Crick, and Franklin used X-ray crystallography to observe the helical structure of DNA. What's the 'control group' that allows us to know this?
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The other molecules that were placed into the machine that produced a different pattern.
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Originally Posted by Lune
In recorded history it has rarely varied as wildly as it is varying (toward higher temperatures) right now, and it coincides with increasing concentration of greenhouse gasses in the atmosphere.
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I've seen some temperature data and I didn't find it very convincing, but you are welcome to post some more as long as it's more than the past 150 years. I'm always willing to update my opinion based on new evidence.
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Originally Posted by Lune
There are also plenty of positive and negative feedback mechanisms that have been accounted for.
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So if you agree that the atmosphere is a tremendously complex, chaotic system with many positive and negative feedback loops, why are you confident in our ability to predict it?