Non-Monotonic Logic

tags
Formal Logic

"Non-monotonic" or "defeasible" logical frameworks allow for retraction of conclusions.

"covers a family of formal frameworks devised to capture and represent defeasible inference" (Stanford Encyclopedia of Philosophy)

See e.g. DR-DEVICE, SPINdle, Flora-2's defeasible logic (crisply explained by Morris), Michael Maher's work

n.b. There is also a specific defeasible logic, created by Donald Nute, called simply "Defeasible Logic".