Rationalization

Rationalization is the substitution of a rational pretext for a real reason, with an implication of self-delusion or hypocrisy; the improvisation of a plausible reason for a human action when one either does not realize the real reason or seeks to keep it secret; the use of a false but reasonable justification or interpretation of an attitude or action, which appears to be unsatisfactory or contrary to accepted reasoning, when one is either ashamed or not aware of his actual motive.