Binaryism
prejudice, discrimination, or antagonism directed against a nonbinary identifying person; or the disbelief of there being more than one gender
Person 1: There’s only two genders because when you are born you are either male or female.
Person 2: Intersex people exist so your argument is invalid anyways, but that is textbook binaryism.
Person 2: Intersex people exist so your argument is invalid anyways, but that is textbook binaryism.