KJV : That <2443> thou mightest know <1921> (5632) the certainty <803> of <4012> those things <3056>, wherein <3739> thou hast been instructed <2727> (5681).

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NASB : so that you may know the exact truth about the things you have been taught.

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NASB# : so<2443> that you may know<1921> the exact<803> truth<803> about<4012> the things<3056> you have been taught<2727>.