Based on sound judgment and reasonable inference; with one's proper justifications; on good grounds.

(law) A legal standard for deciding the outcome of a criminal charge, requiring evidence that is sufficient to eliminate any doubts that a reasonable person might entertain about whether a claim is more likely to be true than not.

Alternative form of beyond a reasonable doubt

There is a reason behind even the most odd and seemingly unnecessary action.

(computing) The process of solving new problems based on the known solutions of similar problems encountered in the past.

(philosophy) The proposition that nothing happens without a sufficient reason why it should be as it is and not otherwise.

Synonym of principle of indifference

Used for consolation, possibly self-consolation, after someone has experienced something bad and for encouragement to make the best of the situation.

One will demand or expect justification; used in threats.