I may be a humble baker but I can tell you, it is a fact that gravity pulls you to earth!!
Originally Posted by DSK
Scientifically speaking, you are incorrect, you cannot call it a "fact," because that doesn't exist. All you can say is that observation strongly supports the current theory.
In a sense, you would be irrational to treat it as anything other than a "fact" that you are going to be pulled to the earth, considering how much observation, scientific
and personal, confirms the theory.
However, this similarly applies to the theory of AGW as well. The evidence and observation we have supporting the theory is overwhelming. The reason I stop short of calling it irrational to deny it is because, unlike gravity, the evidence confirming the theory isn't as obvious and in your face as it is with the theory of gravity. So the personal evidence isn't there, so I can see how some might find it harder to believe. But, make no mistake about it, the theory of AGW is ridiculously well supported by evidence and observation. If you treat gravity as a "fact," you should likewise treat AGW as a fact.