- Completed
- How much of the extraction plan produced a value. Says nothing at all about whether the value is right.
- Value
- Whether the number is believable against this field’s own history. A price can be believable and still be the wrong price.
- Extraction
- Whether the place the value was read from has moved. This is the judge nothing else has, and the only one that catches a correct-looking number read from the wrong element.
- Cause
- What the evidence says is actually wrong — a redesign, a removed element, a real-world price change — and how confident that reading is.
A source can be ok plausible and drifted at the same moment. That combination is the break this system was built to catch, which is why the four are never averaged into one light.