I have learned and read that you should NOT wear a belt with a PC and Vest, but I have yet to hear why.

I've heard that a belt with an Argyle jacket is ok, but with a PC is not ok.

Could someone explain why some accessories are seen as ok, and others are not?

I am talking traditional attire. As we have covered in many other threads, once you understand the "guidelines" you can choose to ignore them or not at your own risk.

I just want to know why a belt and a PC/Vest is seen as taboo.

Thanks!