That character is most often used as a logical negation operator, so it may be confusing to use it as a force-inclusion operator for search. It's also almost n

That character is most often used as a logical negation operator, so it may be confusing to use it as a force-inclusion operator for search. It's also almost never found on standard US keyboards, which is why the tilde is often used as a logical negation operator in it's place.