In addition to deductive inference and defeasible inference, there is also probabilistic inference. In other words, non-monotonic logics are devised to capture and represent defeasible inferences (cf. Thus all deductive reasoning is in reality contingent and defeasible. In modern argumentation theories, arguments are regarded as defeasible passages from premises to a conclusion. But there can be defeasible generalizations (defeasible inference rules). A defeasible estate is created when a grantor transfers land conditionally. This type of reasoning is referred to as defeasible reasoning. In addition, they are not defeasible, but have the force of entailments. In other words, defeasible reasoning produces a statement or claim. Pollock's "undercutting defeat" and "rebutting defeat" are now fixtures in the defeasible reasoning literature. For most or all everyday arguments, the schemes are defeasible. Recent work by Peter D. Klein views knowledge as essentially defeasible. In judicial opinions, the use of "defeasible" is commonplace. On this evidence-based approach, knowledge must be seen as defeasible.