NAL tolerates inconsistency in knowledge, though it is different from the existing paraconsistent logic and belief revision.
For an evaluative question, the statement with a higher confidence value is preferred; for a selective question, the statement with a higher expectation value is preferred.
Given two competing answers, one with a confirmation record of 19 out of 20, and the other n out of n, when we should prefer the latter when n gets larger? It depends on the value of k.
For the inheritance copula, the two premises have four possible combinations, and only one of them corresponds to a valid rule in IL-1. In NAL-1, all can be valid when associated with a proper truth-value function.
Truth-value functions are determined according to the semantics, by treating the involved measurements as extended Boolean variable.
A variant of syllogistic rule is a rule for immediate inference, which only takes one premise.
An inference rule of NAL can be either "strong" or "weak", depending on whether it converges to an inference rule in IL. This distinction is similar to the traditional distinction between "deductive" and "inductive" inference, or between "explicative" and "ampliative" inference.