• social science requires theories that are logically consistent • formal techniques facilitate the construction of precise and deductively sound arguments, the formal language of mathematics can impart greater precision to an argument, and helps guard against inconsistencies • theories have to be precise, logically consistent, original, and empirically valid ←←how the rational choice approach to security studies contributes significantly in these ways? Three criteria for evaluating social science theories: • logical consistency (takes precedence over the other two) • degree of originality • empirical validity.
A theory, in terms of logic, consists of a system of assumptions and conclusions derived from those assumptions. A logical inconsistency exists when two mutually contradictory statements can be derived from the assumptions of a theory →-Logical inconsistencies deny the possibility of a theory having empirical content -any conclusion can be derived when a logical inconsistency exists, and so the choice of which conclusion use for policy purposes falls entirely on the tastes or prejudices of the party making the prescription