| # How to Derive F and E | |
| This document describes an observation-only methodology. | |
| ## Constraints | |
| - No oracle | |
| - No prediction | |
| - No optimization | |
| - No feedback into the system | |
| ## Requirements | |
| F and E must be derived from measurable, external signals. | |
| SYF does not define how signals are chosen. | |
| If derivation cannot be explained deterministically, | |
| it must not be used. | |