so that you may know the certainty of the things you have been taught.
Berean Standard Bible (BSB)
that you might know the certainty concerning the things in which you were instructed.
World English Bible (WEB)
That{G2443} thou mightest know{G1921}{(G5632)} the certainty{G803} of{G4012} those things{G3056}, wherein{G3739} thou hast been instructed{G2727}{(G5681)}.
Strong's King James
(4) In order that you may know the certainty about the words you've been orally instructed.
The F.O.G
The F.O.G Message
that thou mayest know the certainty of the things wherein thou wast instructed.
Young's Literal Translation