The American Institute of Bisexuality argues that "terms like "pansexual", "polysexual", "omnisexual", and "ambisexual" also describe a person with homosexual and heterosexual attractions, and therefore people with those labels are also bisexual" and that "by replacing the prefix bi – (two, both) with pan- (all), poly- (many), omni- (all), ambi- (both, and implying ambiguity in this case), people who adopt these labels seek to clearly express the fact that gender does not factor into their own sexuality", but "this does not mean, however, that people who identify as bisexual are fixated on gender." The institute believes that the idea that identifying as bisexual reinforces a false gender binary "has its roots in the anti-science, anti-Enlightenment philosophy that has ironically found a home within many Queer Studies departments at universities across the Anglophone world," and that, "while it is true that our society's language and terminology do not necessarily reflect the full spectrum of human gender diversity, that is hardly the fault of people who choose to identify as bi. ... The Latin prefix bi- does indeed indicate two or both, however the 'both' indicated in the word bisexual are merely "homosexual" (lit. same sex) and "heterosexual" (lit. different sex)." The institute argues that heterosexuality and homosexuality, by contrast, "are defined by the boundary of two sexes/genders. Given those fundamental facts, any criticism of bisexuality as reinforcing a gender binary is misplaced. Over time, our society's concept of human sex and gender may well change."