Ok I see what your saying. Your saying the truth of Romans chapter one as being truth with a capital T. I sense some circular reasoning their. Your saying people should read the Bible and just know god exists? How does that logic work? Break it down for me. A person reading Romans chapter one is with no excuse is definitely circular logic. Your using someone denying chapter one as proof of its truth!?To answer you, let's stay with Romans one.
What excuse does an Atheist have for their excuse, but nothing at all. Let's take Romans 1:20, How much of this verse do you believe that Atheists will believe of this Verse 20?
Verse 20, explains everything why Atheists or anyone else are without an excuse. Go Figure