Intensional Logic

Intensional logic is an approach to predicate logic that extends first-order logic, which has quantifiers that range over the individuals of a universe (extensions), by additional quantifiers that range over terms that may have such individuals as their value (intensions). The distinction between extensional and intensional entities is parallel to the distinction between sense and reference.

Read more about Intensional Logic:  Its Place Inside Logic, Modal Logic, Type Theoretical Intensional Logic

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    “Histories make men wise; poets witty; the mathematics subtle; natural philosophy deep; moral grave; logic and rhetoric able to contend.”
    —Francis Bacon (1561–1626)