"I am not arguing the validity of that rationale , but that is at least part of the reasoning , I believe ."
"Fair enough . But I am curious to see if anyone can defend the rationality of the rationale ( whatever it is purported to be ) . You 're obviously not obliged to do that , but that is sort of the curiosity that I have ."
"I am not arguing the validity of that rationale"
"But I am curious to see if anyone can defend the rationality of the rationale"