Datapoint Black South African English/Non-standard system underlying responses to negative yes/no questions

Variety: Black South African English
Feature: Non-standard system underlying responses to negative yes/no questions
Value: A - feature is pervasive or obligatory
Informants: Rajend Mesthrie

Examples

Example 3343:
Isn't he arriving tomorrow? - Yes / No
No, he isn't / 'Yes, he is'