I experienced a fun little gotcha moment today that I might as well share.
A conversation partner defined racism this way: "prejudice, discrimination, or antagonism directed against someone of a different race based on the belief that one's own race is superior". Plausible? OK, sure.
That same person separately, minutes apart, opined that it is "literally not possible to be racist against [some white guy]." OK, sure, other loonies have said this too.
But ... what can one deduce if one accepts both those points?
If racism is "a belief that one's own race is superior", and if racism is literally not possible toward someone of the white race, then this must be because no one could believe that their own race is superior to the white race.
Therefore, logically, the speaker must hold that no race can be believed superior to whites' ... as if whites were supreme.
Whoops.