In South Africa, under Apartheid, the whites had a procedure called the 'pencil test' designed to determine whether you were black or white by seeing whether a pencil would 'stick' when pushed into a person's hair as skin colour wasn't a reliable marker for determining a person's 'race'.
In South Africa, under Apartheid, the whites had a procedure called the 'pencil test' designed to determine whether you were black or white by seeing whether a pencil would 'stick' when pushed into a person's hair as skin colour wasn't a reliable marker for determining a person's 'race'.