[ Formula structure ]
The public formula describes structure.
- STS = transfer(visible_form, intended_message, context)
- Private calibration, weighting, and evidence ranking stay protected.
[ How to read it ]
The metric supports screening, not certification.
- A high STS means the pictogram expresses the intended message directly.
- A low STS means the intended message depends on support, convention, or surrounding context.
- Every reading depends on declared context and evidence quality.
- Human validation remains first-order evidence.