I’m Black (I cannot use the lower case as a racial descriptive word) and was born in 1957 in Brooklyn, NY and I’ve never heard of this rule.
It’s a Southern thing.
I’m Black, born and raised in Cleveland, OH. Using the word lie or calling someone a liar has never been forbidden or discouraged.
The problem is that lying requires specific intent to deceive. It is something you really can’t “do your homework” to prove. All you can prove is that someone made (or regularly makes) non-factual claims.
They could be mis-informed and gullible to claims made by others. They could be delusional, or have some kind of mental block that doesn’t even recognize what the truth is.
Calling someone a liar is making a character judgement that is virtually impossible to prove beyond any doubt. That’s why so many find it unacceptable. That’s why it’s not allowed right here in GD.
And it’s certainly not a “black” thing.
Why not? Will you get in trouble?
I’m a white American, and I was taught that the verb “lie” included a mental element or intent. If a person was “lying”, then they knew that what they were saying wasn’t true but chose to say it anyway. It was more polite to claim, “I don’t think Bill is correct about that” or “Sis said that the papers were in the garage, I disagree - I saw her moving them to the shed this morning” You are pointing out the fact that you feel the statement was inaccurate without making a judgment as to knowledge or intent, something that is often hard to judge.
Yes, the Negro Community Will Frown Upon His Shenanigans.
Would terminalogical inexactitude have occasioned punitive corporal chastisement?