Channel 24 reports Nelson Mandela's granddaughters hosted a Twitter Q&A on his condition.
Journalist Deborah Patta asked if Mandela was communicative, to which @beingmandela responded "he smiles".
Natasha Tay asked if the former president communicated in other ways.
"...with eyes and eye movement," was the response, says Channel 24.
Answers to questions about Mandela's health remained evasive, with regular references to the duo's lack of medical knowledge.
Karen Osborn said: "I believe that a person can only stay on life support for so many days, how is this possible?"
The reply was: "That's a question for the doctors, never went to [medical] school. Sorry.
"We are relying on the medical team to advise us and they have been doing an amazing job and most important[ly] we put it in God's hands," they replied, quotes Channel 24.