What is the significance of a false statement under oath?

CNN: Transcript: Judiciary Committee impeachment hearing

And then, be confronted with someone who would tear it down by false testimony, by lies under oath.

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Two of the most serious charges against him, of making a false official statement, and of lying under oath and obstructing justice, were dropped on a technicality.

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The indictments, handed down by a Fulton County grand jury, include 10 counts of theft by taking, 10 counts of giving false statements, 10 counts of violation of oath of office, four counts of first degree forgery, and one count of attempting to influence a witness.

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Or would they provide false information -- not just to a spouse or to loved ones, but under oath in a court of law?

CNN: Transcript: Judiciary Committee impeachment hearing

For two counts, prosecutors used the false statements statute (United States Code, Section 1001), which criminalizes lies made not under oath.

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