We are talking about the linked article. In it there is a an estimate by a bunch of scientists which has been rejected in favour of one person's estimate. None

We are talking about the linked article. In it there is a an estimate by a bunch of scientists which has been rejected in favour of one person's estimate. None of it is about 2020 by that point in the article or this discussion. Perhaps, you are confused because you thought we are talking about a worldwide scientific consensus? >As what I say is true, unless a sound refutation is provided, this should be the scientific consensus. This is not what consensus means (and again, nobody is claiming today that there is a consensus that self-driving cars will arrive in 2020).