Visconti's Law is set forth by Professor Jacobson at Legal Insurrection. Jacobson is talking about Luke Visconti, owner of DiversityInc., a publication which (I assume for a fee) will help me with "diversity management", defined as proactive management of race/culture, gender, orientation, disability and age to ensure equal outcome in relationships with employees, customers, investors and suppliers.
Mr. Visconti, it seems, thinks that the denial of a charge of racism constitutes proof of the accusation.
There are also many rally signs and bumper stickers about the Tea Party NOT being racist. If you have to repetitively deny it, something is probably wrong.
And Visconti's Law?
The longer the playing of the race card continues, the probability that someone will deny the accusation, and thereby provide proof of the accusation, approaches one.