The article starts with the introduction of the Lithuanian reader into the expected utility theory which is the core of the decision theory known under the name of the rational choice theory or by the name of the thin theory of practical rationality too. This theroy conceives practical rationality as maximization of the expected utility defined as the measure of the preferences which ... https://www.roneverhart.com/LifeWalker-UPwalker-Premium-Lite-Upright-Rolling-Walker/