I understand the meaning of that word, and I worry that we are being led to hang our collective hats on a probability. Whenever someone challenges that probability, they're a denier, and chastised for being so.
I call CM a denier because he's not a true skeptic. When he is given evidence, he doesn't modify his questioning. He still repeats the same talking points. A skeptic does not do such a thing.
Probability is how scientific findings work. If I measure my fish, and the average growth rate is 0.92% of body weight per day, and another tank treated differently is 0.89% of body weight per day, is there actually a difference? If I run the same experiment again, will the results be the same? That is why we need statistics. The variability intrinsic in the treatment groups informs us as to whether the differences between groups are meaningful or not, and it's based on probability.
The bell shaped curve, is called the normal distribution in science. The probability of an event at the top of the bell, is much higher than one out on the extreme ends of the tails. Results out on the tails indicate there is a significant difference. Scientists learn about the world be studying why that finding is out on the far end of the curve.
That is where climate change is. The rate of warming is significant, the rate of ocean acidification is significant, the rate of shrinking ice is significant, the rate of stratospheric cooling is significant, the rate of water vapour increase is significant, and the growth of carbon dioxide in the atmosphere is significant.
It's not resting on one probability. Like I have said many times, these things have been investigated multiple times, and the results are robust (the results are confirmed by multiple studies using different methods to investigate the same phenomenon).
It's many probabilities. And when you add that all up, it's increasingly unlikely that all of these probabilities could be consistent, and also wrong.
I fully grasp that the "Deniers" are likely funded by interests most affected. But so are the "Purveyors" of the AGW theory, and is just that, a theory. No?
Just a theory is like saying the law of thermodynamics is just a law. A theory and a law are both accepted as facts by science. They aren't the same things. A law is a concise relationship that is universal and can be expressed with a mathematical relation. A theory is not necessarily universal (evolution on another planet might not be driven by the same genetics for instance) and is not a concise mathematical relationship. You can't plug numbers into an equation to get evolution. A theory is a group of well tested hypotheses that describes a larger sort of phenomenon.
Both are supported by repeated findings that confirm the hypotheses.