
"The intelligence failures surrounding the invasion of Iraq dramatically illustrate the necessity of developing standards for evaluating expert opinion. This book fills that need. Here, Philip E. Tetlock explores what constitutes good judgment in predicting future events, and looks at why experts are often wrong in their forecasts." "Tetlock first discusses arguments about whether the world is too complex for people to find the tools to understand political phenomena, let alone predict the future. He evaluates predictions from experts in different fields, comparing them to predictions by well-informed laity or those based on simple extrapolation from current trends. He goes on to analyze which styles of thinking are more successful in forecasting."--Jacket.
As you note, we need to decide who to trust, and we can't do sufficient research. So we need heuristics.
The heuristics that I recommend are these:
1. Certainty, especially if there is debate among experts, indicates likely cognitive bias.
2. The ability to discuss how multiple perspectives would lead different people to different conclusions, suggests good reasoning.
3. A documented history of quantitative reasoning, along with data showing historical accuracy, is the best evidence of a trustworthy source.
I base those heuristics on the research in https://www.amazon.com/Expert-Political-Judgment-Good-Know/d.... Applying this heuristic to "sounds certain" results in a conclusion, that is an invitation to further research that may or may not happen.
There is a very simple litmus test to tell which are likely to fade, versus which aren't. How certain are they?
https://www.amazon.com/Expert-Political-Judgment-Good-Know/d... reports on a long-term study about pundits. Basically they can be divided into two groups:
1. Hedgehogs. Have one overarching theory that they are certain of.
2. Foxes. Can pick and choose from a variety of sources.
Both groups are smart, informed, and interesting. But when you follow them for a long time, a clear pattern emerges.
- Foxes do much better at making future predictions that come true.
- Hedgehogs become far more popular pundits, and generally wind up getting paid far better. Most pundits with popular shows are hedgehogs.
Why? My theory is that we listen to pundits because it is comfortable to outsource our thinking to them. We find that comfortable if they are smart, well-informed, and certain. It is easy for us to think, "Well if this smart and well-informed guy is so certain, I'd surely agree if I did the work. So now I don't have to bother."
There is a problem here. We become certain when it is easy for us to think a thing true, and hard for us to think it might be false. We feel that the evidence is truly overwhelming. It may be overwhelming. But it is more likely that we're simply being intellectually dishonest. So we actively choose intellectually dishonest pundits who agree with our presumptions, and then become sure that they are right. We enjoy listening to them. But, being intellectually dishonest, they are probably wrong. And now we're emotionally committed to their brand of insanity!
Try this rule of thumb out. Assume that a person who is certain, is probably wrong. And when you find yourself feeling certain, nurse that little doubt about how you REALLY know. It takes time, but consistently making this choice can change your life. For a start, you'll start actually thinking about things that you currently only think you're thinking about.
https://press.princeton.edu/books/hardcover/9780691178288/ex...
That said, I find myself using one of the classic defences of a confident prognosticator: I am right / I will be right, except about the timing[0]. But to make more verifiable predictions I would need to start assigning probabilities to particular dates.
[0] Tetlock's Expert Political Judgment: How Good Is It? How Can We Know? is still a brilliant and amusing empirical study of opinionated forecasting: https://www.amazon.com/Expert-Political-Judgment-Good-Know/d...
http://www.amazon.com/Expert-Political-Judgment-Good-Know/dp...