Rescue, your language is abhorrent. Even if your Torah was perfect you can never be respected as a Ben Torah using those words and acronyms.
Shaatnez is not perfectly logically. What you mean to say is that you’ve come across a scientific phenomenon that is congruent with the mitzva of Shaatnez. Once you decide that you’ve found the reason behind the mitzvah you’ve replaced the mitzvah with the reason and will then derive laws that the Torah never intended.
Regardless, by stating that Shaatnez is perfectly logical you’ve actually defended his accusation that you won’t keep a mitzvah unless it makes sense. You are basically saying that you keep Shaatnez because you’ve uncovered the reason behind it and now it makes sense.