justify (something) by (doing something)
To attempt to prove that something is just, right, or valid by saying, asking, or explaining something. In passive constructions, a noun or pronoun is used instead of a gerund. When I confronted him about transferring the money into his personal bank account, he justified it by saying that the company would be able to dodge a lot of taxes that way. She justified her actions by explaining that the needs of the many outweighed the needs of the few. I know my policies have been controversial, but they have been justified by their results!
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