A Black Lives Matter-supporting teacher took to Twitter to assert that 2+2 only = 4 because of “western imperialism.” Yes, really. Brittany Marshall’s tweet went viral after she claimed during the course of a discussion about racism, “Nope the idea of 2 + 2 equaling 4 is cultural and because of western imperialism/colonization, we think of it as the only way of knowing.” Marshall, who includes her pronouns in her bio, lists her occupation as “teacher, scholar, social justice change agent” and apparently is studying for a PhD at Rutgers. Her bizarre statement is yet another example of Intersectionality, the...