Yes, I did learn something today from reading that article and the code sections in it. I think I had just gotten that idea from hearing so many other people say it, so I thought there must be something to that. Although I kept slightly cautious with my wording of "I think" or "pretty sure" to leave room to be shown differently.It is perfectly acceptable to run sheathed cable inside conduit. I don't know where the contrary notion came from, but boy is it pervasive.