Limited information guides decision-making.

(philosophy) A specific form of rationality focusing on the most efficient or cost-effective means to achieve a specific end, but not in itself reflecting on the value of that end.

a work of Harry Potter fan fiction by Eliezer Yudkowsky published on FanFiction.

"Instrumental" and "value rationality" are terms scholars use to identify two ways individuals act in order to optimize their behavior.

Communicative rationality or communicative reason is a theory or set of theories which describes human rationality as a necessary outcome of successful communication.

As the study of argument is of clear importance to the reasons that we hold things to be true, logic is of essential importance to rationality.