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1. any process of reasoning from premises to a conclusion
2. Logic the specific mode of reasoning used



the mental activity that makes a connection between disparate thoughts, linking them in a set of premises and conclusions. It is by inference that the norms and categories of such connections, which are inherently present in the social or individual consciousness, are expressed on the level of “inner speech.” Indeed, these norms and categories themselves—in any given instance—constitute the psychological basis of inference; when they coincide with the rules and laws of logic, the inference is judged by its result to be equivalent to logical deduction, although generally speaking there is a qualitative difference between logical deduction and inference.

Logical deduction, as distinct from inference, rests on “external means”; it operates through the verbal (symbolic) recording of thoughts or through their formalization—that is, the codification of thoughts and representation of their connections by one or another formal language or system, such as calculus—with the goal of reducing to a minimum the subconscious, enthymematic, and elliptical elements of deduction and translating abstract or “convoluted” thought processes into the language of “images.” Furthermore, the “legitimacy” of inference need not necessarily be determined by logical norms. For example, an incomplete induction is precisely an inference and not a logical deduction, inasmuch as the connection between premises and conclusions in induction has a factual and psychological basis (as expressed in the well-known norms of generalization) but lacks a logical basis—that is, lacks those formal rules by which thinking proceeds from the particular to the general.

A further distinction is drawn between inference and reasoning: the latter is always a consciously willed mental activity, while an inference, in principle at least, can be both involuntary and an act of the subconscious.



The logical process by which new facts are derived from known facts by the application of inference rules.

See also symbolic inference, type inference.

inference engine

An inference engine makes a decision from the facts and rules contained in the knowledge base of an expert system or the algorithm derived from a deep learning AI system. The inference engine is the processing component in contrast to the fact gathering or learning side of the system. See deep learning and expert system.
References in periodicals archive ?
However, we can get some feeling for the coverage of our type inference techniques by examining a few typical examples.
Having specified the Bayesian model through a domain expert's opinion, we used Hugin model's inference techniques to propagate probabilities through the model (Jensen, 1997).
In silico network inference challenges under the Dialogue on Reverse Engineering Assessment and Methods (DREAM) projects--DREAM3, DREAM4, and DREAM5--have explored the strengths and weaknesses of important and widely used network inference techniques based on gene expression data.
He surveyed the main logic-based languages that have been considered for describing data sources in data-integration systems and the specialized inference techniques developed in this context.
Thus, it is important to evaluate the effectiveness of static and dynamic inference techniques on MATLAB codes because it is not clear that static inference techniques would be equally effective on MATLAB and APL.