NET
6 And even if I am unskilled in speaking, yet I am certainly not so in knowledge. Indeed, we have made this plain to you in everything in every way.
Darby
6 But if [I am] a simple person in speech, yet not in knowledge, but in everything making [the truth] manifest in all things to you.
KJV
6 But though [I be] rude in speech, yet not in knowledge; but we have been throughly made manifest among you in all things.