Look up Rationalization on Wiktionary, the free dictionary
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In psychology, rationalization is the process of constructing a logical justification for a decision that was originally arrived at through a different mental process.
In British history it was the process of destroying old factories and gradually replacing them with newer and better ones. This was incorporated by Neville Chamberlain in 1931 and it eventually ended in 1938.
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However, rationality is a much broader term than logic, as it includes "uncertain but sensible" arguments based on probability, expectation, personal experience and the like, whereas logic deals principally with provable facts and demonstrably valid relations between them.
Others think that any kind of rationality along the lines of rationalchoicetheory is a useless concept for understanding human behavior; the term homo economicus (economic man: the imaginary logically consistent but amoral being assumed in economic models) was coined largely in honor of this view.
Rationality is a central principle in artificial intelligence, where a rational agent is specifically defined as an agent which always chooses the action which maximises its expected performance, given all of the knowledge it currently possesses.