BERNARD MAKGABO NGOEPE
You could argue that they changed but what they initially said could not have been a mistake.  It's one thing to, well, everybody are entitled to make mistakes and then of course correct them, but what they said earlier on, right from the beginning, whatever they said, which they sought to change later, could not have been a mistake because it is in respect of something, the facts are on that particular thing were in their knowledge.