Can you reword this question? I'm not understanding it.
Ok. Romans 1:18 asserts that the lost world "holds down" or surpresses the light they are given. In Romans 1:18-32 there is no other assessment given other than supression of the light. In Romans 1:21-32 there is a distinct model of what hardening is and its downward spiral progression that begins with intentional surpression of light unto the point of hardening where the person takes delight in others rebelling against the light.
My point is that the light provided in Romans 1:19-20 finds no other response by the lost world then surpression and hardening. No other response to the light given by God in Romans 1:19-20 is to be found. If the lost condition or the fallen nature would make any other kind of response other than supression and hardening then why is it not mentioned?
I believe it is not mentioned because it is Paul's intent to prove what he says is his conclusion in Romans 3:9-20 that no lost person, Gentile or Jew seeks after God or responds by any good or righteous act toward God. Thus the fallen nature described in Romans 3:10-18 responds only by supression of light when exposed to light (Rom. 1:18-20) which leads to a progressive hardening (Rom. 1:21-32).