So going back to the Robert George quote from the essay - imagine you had been born a white male into a southern slave-holding family in 1750. What basis do you

So going back to the Robert George quote from the essay - imagine you had been born a white male into a southern slave-holding family in 1750. What basis do you have for believing you would have been against chattel slavery? It seems like your only two options are "I just wouldn't have had an opinion on it" or "My opinions TODAY are uniquely correct for all time going forward". Unless you like to imagine future-you persecuting current-you.