Variation Comparator
Check how two candidate phenomena differ once a constraint points you toward a smaller set.
Flagship · Constraint Simulator
Winter Constraint Lab
Change the premises and see which interpretations survive. Every output is conditional, and every assumption remains visible.
Conditional interpretation
Run the lab to see what these constraints support and what remains unknown.
Model contract
This is a reasoning simulator, not a weather model.
Inputs are conceptual constraints. They are not live measurements and are not tied to your location.
Outputs use possibility language. “Compatible with” and “plausible” are not forecasts.
Unknown stays unknown. The lab never fills missing temperature, wind direction, fetch, terrain, snow depth, or hazard data with invented values.
Connected views
Carry a constraint into another lens.
Observation Lab
Separate simulated premises from what you can actually observe in the field.
Field Atlas
Return to source-backed definitions and evidence boundaries.