Oh, and God bless you for remembering the sheetwall.<quoted text>
You quite clearly got your information from google and don't know what you're talking about. If you know the source, and you apparently do not, it's because wikipedia gave it to you.
You don't know the context, you don't know the anthropological discussion surrounding human universals, you don't know where the term originated, you don't know how to use the word.
Imagine if you hire somebody to drywall your house. They showed up and they called it "sheetwall" and then they didn't know what brand to use. When you question them on it, they give you answers like you provide above. You'd fire them.
You're just continuing to be dishonest.