Earlier quoted context omitted.
> There are "No" brilliant jerks? Absolutely none? What evidence is that based on? "No" here is used in the sense of "no pets", "no solicitors", "no outside food or drink beyond this point"
If you don't want brilliant jerks, you are inherently negating their brilliance. A simple chain of logic, extrapolating from that headline, would lead to "if they truly were all around brilliant, they wouldn't act that way. They would be more brilliant if we replaced their non-brilliant side with our brilliant behavioral prescriptions."
This isn't how logic works... It's a statement, saying "No Brilliant Jerks Welcome Here". It does not negate their existence, only their company.