> It has nothing to do with racism, but good on you for bringing racism into the argument though.
Nonsense. This is all part of the "oppressive language" concept peddled by the neo-Marxist authoritarian types.
> Some people use the term opaque box instead because it a more clear antonym to clear/open box.
This is the first time in my life that I head the term "opaque box" used instead of "black box" in this context. I couldn't even find this phrase using a Google search.
Black box vs clear/open box are very well known terms. Some people use the term opaque box instead because it a more clear antonym to clear/open box.