Strict conditional in the context of Modal operator

⭐ Core Definition: Strict conditional

In logic, a strict conditional (symbol: $\Box$ , or ⥽) is a conditional governed by a modal operator, that is, a logical connective of modal logic. It is logically equivalent to the material conditional of classical logic, combined with the necessity operator from modal logic. For any two propositions p and q, the formula p → q says that p materially implies q while $\Box (p\rightarrow q)$ says that p strictly implies q. Strict conditionals are the result of Clarence Irving Lewis's attempt to find a conditional for logic that can adequately express indicative conditionals in natural language. They have also been used in studying Molinist theology.

↓ Menu

Strict conditional in the context of Material conditional

The material conditional (also known as material implication) is a binary operation commonly used in logic. When the conditional symbol $\to$ is interpreted as material implication, a formula $P\to Q$ is true unless $P$ is true and $Q$ is false.

Material implication is used in all the basic systems of classical logic as well as some nonclassical logics. It is assumed as a model of correct conditional reasoning within mathematics and serves as the basis for commands in many programming languages. However, many logics replace material implication with other operators such as the strict conditional and the variably strict conditional. Due to the paradoxes of material implication and related problems, material implication is not generally considered a viable analysis of conditional sentences in natural language.

View the full Wikipedia page for Material conditional

↑ Return to Menu

Strict conditional in the context of Modal operator

Strict conditional Study page number 1 of 1

Play TriviaQuestions Online!

Skip to study material about Strict conditional in the context of "Modal operator"

⭐ Core Definition: Strict conditional

Strict conditional in the context of Material conditional