An oath or sworn statement made before a main or formal oath, or preliminary swearing in of a witness.
From Latin 'ante-' (before) combined with 'juramentum' (oath or sworn statement), used in legal contexts for preliminary oaths.
In old legal systems, antejuramentum was how courts tested whether someone could be trusted before having them swear the 'real' oath—a vetting process for honesty itself.
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