Here is the majority of an e-mail I sent to my father many months ago in the midst of the election, on why his statement that there is still disagreement within the scientific community on global warming was fundamentally mistaken:
————————
The confusion about whether scientists agree or not comes about thus; of course, in any large, free community there will always be at least a few dissenters on the consensus, no matter what. This is the consequence of the incalculable effects of personality and unknown intent; always someone will say, “I don’t quite agree,” usually for the thrill of being the contrarian. In political issues today, a lot of the scientists that go against the grain of what the *vast* majority of the scientific community considers solid fact — such as global warming and evolution — are often either 1) scientists paid for or in the service of other interests, or 2) crusaders with another goal, such as Christian scientists who find one or two “gaps” in evolutionary theory and thus conclude it must all be a lie.
Now, no one in the scientific community finds bad science convincing. These scientists become ostracized in the world of empirical data and fact and the damage goes no further there. However, in the political world the dissenting scientists are picked up on, and put on radio talk shows and the “issue book” of the month and those who want to believe in a vast liberal conspiracy within the scientific community go “Look!, see!, they don’t all agree cause this guy says the human eye is irreducibly complex!, or that the earth is actually getting *colder*, not warmer!” But what the radio listeners and book readers don’t know is that nobody in the scientific community takes that scientist’s opinions seriously – and not because it goes against their agenda, after all there are plenty of conservative, especially fiscally conservative if not socially, scientists — but because they are not sufficiently (or at all) supported by empirical data.
Yes, liberals do the same things with results they find more pleasing to their agenda and plaster them up all over; but on the whole, which side the scientific community as a *whole* comes down on is the most important barometer of what is really happening (or has happened, in the case of evolution) because the scientific community has absolutely no reason to guide a complex public relations hoax with bad science. Again, this would be akin to historians writing collective fiction or a pilot not bothering to keep care of his plane.
The beauty about science is that facts don’t lie, they don’t have agendas, and they don’t pontificate. When it comes to these issues those that say “this is all up in the air” or “the facts are not fully in” are really just saying, “well, most of the facts go against us but, we don’t like those conclusions so, we’re gunna go find random dude number 1 and even more random dude number 2 who disagrees and say that therefore, ‘the jury is still out’”. But there will always be people who decide to interpret the data differently, even when they are a quite a minority, as they are — because it always feels good to go against the grain and depict yourself as a persecuted crusader for truth, even if your truth it based more on politics and/or religious belief than facts. Therefore, looking at the majority scientific opinion is really the place to go for your best bet. And if the scientists end up being wrong, the great thing is that they will change their theories when they realize the data has been misconstrued; because as a whole, the scientific community is interested in doing good science, and nothing else.
Like Michael Shermer has said (who by the way is another fiscally consverative, socially liberal skeptic, like a lot of scientists), the question should not be “do you believe in evolution?” but “do you accept evolution?” because it is in fact so established as empirical reality that that is like asking, “do you believe in gravity?”