It sounds like the symbol "≹" just means "incomparable", which is a well-known concept in math. https://en.wikipedia.org/wiki/Comparability
This symbol for it may be useful, but it's the concept that matters.
This symbol for it may be useful, but it's the concept that matters.
> To conclude, the ≹ symbol plays a crucial role in providing a middle ground between the traditional relational operators.
As a PhD student in math, I have never seen it before. I do not believe that it plays any crucial role.