(obsolete) To be right. / To have grounds, justification etc. (to do something, or for something).

(idiomatic, chiefly in the negative) Logic; common sense.

(idiomatic) To seem logical, rational, or reasonable; to make sense.

(US, idiomatic) For reasons unknown and not worth speculating on.

(philosophy, logic) In artificial intelligence, modus ponens.

The process of making inferences based upon observed patterns, or simple repetition. Often used in reference to predictions about what will happen or does happen, based upon what has happened.

(law) A fictional person used as a comparative legal standard to represent an average member of society and how he or she would behave or think, especially in determining negligence; sometimes formulated as "a person of ordinary prudence exercising due care in like circumstances."

Determining plausibility based on a set of evidence.

Inference in which the conclusion cannot be false given that the premises are true. / Inference in which the conclusion is of no greater generality than the premises.

(nonce word) A twofold or double reason.