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Definition of authenticate:

  1. To prove authentic; to determine as real and true; as, to authenticate a portrait.
  2. To render authentic; to give authority to, by the proof, attestation, or formalities required by law, or sufficient to entitle to credit.


vindicate, show, point to, evidence, vouch for, back, study atverify, justify, bear out, true, argue, assert, make/prove your/a point.

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