An understanding between entities to follow a specific course of conduct.
Rules that exist in many languages that force some parts of a sentence to be used or inflected differently depending on certain attributes of other parts.
A legally binding contract enforceable in a court of law.
A state whereby several parties share a view or opinion; the state of not contradicting one another.
Correspondence or compatibility.
Freedom from contradiction; the state of a system of axioms such that none of the propositions deduced from them are mutually contradictory.
Reliability or uniformity; the quality of being consistent.
The degree of viscosity of something.
Local coherence.