Durban - Newly elected KwaZulu-Natal ANC Youth League leader Thami Ngubane has hit back at his detractors, saying his "grey hair is a sign of wisdom". And he added, because he exercises a lot, he looked "very buff".On Tuesday, Ngubane took to Facebook to clear the air about his age by posting a picture of his ID for all to see. It shows a young Thamsanqa Clive Ngubane, born on September 15 1983. The ID issue date was July 9 1999.He said perhaps it was the grey hair on his beard that made him look older.“In African culture we call the grey hair Ufuzo, this is when you grow grey hair while you are still young. We believe that it is a sign of wisdom. I also exercise a lot as well so I look very buff,” said Ngubane.Ngubane, who is also the Umvoti mayor, was elected the provincial ANC Youth League chairperson during an elective congress at the Ugu Sports and Leisure Centre in Port Shepstone at the weekend. He beat his opponent Sipho Hlomuka.On June 8, the morning after the elections, Sibulele MaTshangisi Twashu posted a picture of Ngubane on his timeline with the caption: Mayor of uMvoti Municipality & KZN ANCYL Chairperson #HandsOffThami.Questions over ageThe photograph, showing Ngubane in a suit carrying documents, solicited comments questioning Ngubane’s age. Duma Mditshiwa posted, “How old is he after deductions? Lol”Zola Blackie Tshayana posted, “But this chap looks older than I am. Luckily he is tagged so he can dispute the facts with evidence.”And Tshepo Themba Ncube wrote, “It seems the ANCYL is famous with age fraud.”On Twitter @Siyazi tweeted, “But the new ANCYL leader in KZN Thami Ngubane does not look anything below 37 years of age.”@MaakeTopclassmt tweeted, “This fossil Thami Ngubane said he wants to deal with EFF, I think he must deal with Nkandla first.‘Haters’A livid Ngubane told his "haters" where to get off. He wrote on his wall: “I'm deeply troubled by the intellectual laziness demonstrated by a bunch of young people who are in politics through the imagination.“I'm saying that because they have not mastered some basic [skills] like critical thinking. Let me dish out some lectures to them free of charge.“There are different types of arguments, amongst them is an argument called empirical argument which in simpler terms is called "argument of facts ".“This type of argument does not value your feelings or your point of view, but in reality that is verifiable.“Debate around date of birth of any individual does not depend on your feelings or point of view, it exists independently. It's an empirical argument. KZN ANCYL PEC would not apologise that [I] was elected.”Ngubane told News24 that he needed to clear the air.“There was a campaign that was being run on Facebook that sought to create doubt about my age. People were doubting that I was born in 1983.“People say that I look older than 35. I am 31, turning 32 this year.”Ngubane said, “If a lie is being repeated people are going to start thinking that it is true. So I had to clear the air. After putting the picture of my ID has silenced a whole lot of people."