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A modal logic is any system of formal logic that attempts to deal with modalities. Modals qualify the truth of a judgment. For example, if it is true that "John is happy," we might ...

• Development of modal ... ·
• Formalizations ·
• Alethic modalities ·
• Epistemic logic

• en.wikipedia.org/wiki/Modal_logic
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• plato.stanford.edu/entries/logic-modal

A discussion of modal logic by John McCarthy.

• www-formal.stanford.edu/jmc/mcchay69/node22.html
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Molle is a cross-platform prover for modal logic, that exploits the modal semantic tableaux method. It features a very usable graphical interface, with interactive ...

• molle.sourceforge.net
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Modal Logic. Examples For convenience, we reproduce the item Logic/Modal Logic of Principia Metaphysica in which the modal logic is defined: In this tutorial, we give examples of ...

• mally.stanford.edu/tutorial/modal.html
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Modal Logic. Introduction Modal logics were created so we can express ideas like the following without having to use quantifiers and variables:

• www.csci.csusb.edu/dick/maths/logic_9_Modalities.html
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modal logic. Formal system s incorporating modalities such as necessity, possibility, impossibility, contingency, strict implication, and certain other closely related concepts.

• encyclopedia2.thefreedictionary.com/modal+logic
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In philosophical logic, a modal logic is any logic for handling modalities: concepts like possibility, impossibility, and necessity. Logics for handling a number of other ideas ...

• psychology.wikia.com/wiki/Modal_logic
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Epistemic modal logic is a subfield of modal logic that is concerned with reasoning about knowledge. While epistemology has a long philosophical tradition dating back to Ancient ...

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• Standard possible ... ·
• The properties of ...

• en.wikipedia.org/wiki/Epistemic_modal_logic
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Welcome to modal logic! At Modal Logic we excel were other technology providers fail. By delivery on our promises, we make IT work. Modal Logic is a provider of I.T.products and ...

• www.modallogic.ca
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