Oh I see. Thanks for explaining.
Here's what's wrong with your argument, then. Follow closely. This gets a little complicated.
First off, before I even start, I should probably point out that, from your prior post, I inferred a definition of "critical thinking" that involved actually CHOOSING to do the analysis undergirding a particular belief -- a distinct question, obviously, from how well one would do it if one did it. So for example, you mentioned -- as an example of lack of critical thinking -- that an engineer would not be able to give proofs of Boolean logic. Well, I'm sure we both probably agree that any engineer who's using Boolean logic well would be able to LEARN how to prove it -- he just hasn't. So you were using critical thinking to mean, among other things anyway, the choice to actually analyze those arguments that undergird one's beliefs. I accepted this definition as suitable to the context.
Now, however, you are trying to suggest that it means ABILITY to analyze, think, and come to conclusions well. This is also a fine definition, but it's a DIFFERENT definition, and you can't just interchange the two. This is, indeed, very close to core intelligence, to my way of thinking.
So, let's call the former definition CT-1 (the choice to analyze); the second one CT-2 (the ability to analyze); and intelligence, we'll call intelligence.
Now, as between the people in my "loaded" hypothetical, NEITHER displays CT-1, while the engineer does have intelligence to a high degree and (thus) presumably CT-2. Whether the second person has them is unknown. Hence, the key question was whether you would infer, just from the fact that person 2 believes in evolution for reasons unrelated to an actual use of intelligence (or of either form of critical thinking) that he actually excels better at analysis.
I look forward to your answer.
I will also say that I don't see my hypothetical as loaded at all. Lots of very good engineers are skeptical of evolution; indeed, perhaps at a higher rate than any other sciencey discipline. I know several personally, both religious and irreligious.