Concepts

Understand System One and the typed question primitives behind Jev decisions.

Jev is easiest to understand through its three question primitives. Choice selects from named options, Score places an input along ordered levels, and Noul returns the probability that a yes-or-no proposition is true. The model evaluates questions against shared state, but your application remains responsible for combining answers and deciding when to automate. Use this section to learn the contract before copying code. A typed output prevents malformed prose, not incorrect judgment, so representative evaluation data and explicit uncertainty handling are still required.