D.1. Rationality: To be aware of the implications of the given means and ends, of the contradictions therein, of the sacrifices necessitated by their logic, and, most important of all, to strategize is Rationality.
E.1. By Rationality it is implied that:
i. All freely available information about means and ends is acquired. All costlier is subject to cost-benefit.
ii. All contradictions between ends are discovered.
iii. All implications for pursuing multiple ends using available social and technical conditions are discovered.
iv. All relative valuations of means given the ends are discovered, calculated.
v. All sacrifices, costs, necessitated by reason are also discovered.
vi. A consistent long run path for achieving conflicting goals is discovered as a consequence of studying a logical implication of means and ends.
vii. By discovered, it means to logically deduce from the given, or an implication.
viii. By logically deduce, it implies deliberation, and conscious awareness.
ix. None of the i-viii implies any restriction about behaviour, or motive of the agent.
x. None of the i-viii implies Rationality is just "as if" assumption held as an instrument.
xi. By discovering a long run path, it implies strategizing.
xii. By strategizing, it implies intentionality, and analysis of dynamics.
xiii. In a simplified form, Rationality, following i-xii, is but a synonym of strategizing.
Reference: Chapter 06 of Robbins, L. (2007). An essay on the nature and significance of economic science.