$ eldr --explain confidence
Every read carries a number out of ten, and the most common misreading of it is that 7/10 means a 70% chance of a good outcome. It does not mean that, it cannot mean that, and if it did the whole product would be a forecasting tool, which is the one thing it has promised never to be.
Here is what the number measures: how much of the position survives the counter-case. That is it. It is an internal consistency score on your own fourteen answers, not a probability attached to the world.
Most of the library is open. The material that names costs and patterns directly sits with the instrument that uses it.
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No trial. There has never been one.