nonconditional

Nonconditional is an adjective meaning not conditioned or restricted by a condition; equivalent to unconditional. It is used to describe statements, probabilities, or commitments that do not depend on another event, premise, or stipulation.

In logic and mathematics, a nonconditional statement is one that does not reach its conclusion by reference to a hypothesis or antecedent. It contrasts with conditional statements of the form if A then B. For example, "the sum of two integers is even" is a nonconditional claim about all integers, whereas "if a number is even, then it is divisible by 2" is a conditional claim.

In probability and statistics, nonconditional (or unconditional) probability refers to the likelihood of an event without specifying any conditioning information. It is the marginal probability P(A). Conditional probability P(A|B) requires knowledge of the condition B. The relationship between them is captured by the law of total probability and Bayes' theorem when conditioning events partition the sample space.

In practical use, "nonconditional" is often replaced by "unconditional." It appears in scientific literature when the emphasis is on independence from conditions, or to distinguish from conditional cases in model specifications, policy language, or grant funding where a nonconditional grant carries no strings attached. See also: unconditional probability, conditional probability, unconditional statement.