Hi, They were intended to help researchers in seeking the truth, or in seeking to reveal untruth. They were intended to help researchers in seeking the truth or in seeking to reveal untruth. I would say that in #1 "or in seeking to reveal untruth" is unnecessary and was added at the last minute as some kind of last observation but not in order to precise in the meaning, but rather as something that was added so as to not render the sentence factually incorrect.
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