Acting on it · The outcome · Element
The lesson
What the difference teaches.
The part
What it is
A prediction that was too large suggests over-confidence; one that was too small suggests a mechanism nobody modelled.
Accumulated across several analyses, this is the record that makes an analytical function better rather than merely busier.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.