Romans 3:7

Someone might argue, "If my falsehood enhances God's truthfulness and so increases his glory, why am I still condemned as a sinner?"

(v7, NIV)

But if through my lie God’s truth abounds to his glory, why am I still being condemned as a sinner?

(v7, ESV)

Here we get to see Paul's second point about what these objectors have to say. Paul is continuing to point out the contradiction in their objection against Paul. They call Paul out on a contradiction because judgment of the unrighteous leads to the glorification of God and therefore you can't judge the unrighteous. Paul's first point in revealing a contradiction in their argument is that if God can't judge the unrighteous, then he can't judge the world. His objectors probably would've been glad and waiting for God to judge the world, so there is their first contradiction in their objection. The second point Paul makes is about himself. They are arguing with Paul and they probably didn't really like Paul. In addition to finding pleasure in God judging the world, they probably would've also found pleasure in God judging Paul. However, if they think Paul is unrighteous and wrong, then God can't judge Paul either because Paul becomes the instrument of God glorification. Now, the NIV and the ESV are both up there because the NIV begins with "someone might argue". The translators of NIV seem to attribute this argument to a hypothetical person. If that is the case, then it seems to simply flow and tie into the next verse that Paul says. Either way, it continues to show that these objectors have involved themselves in a contradiction.