Assuming that 100% unassisted evolution is feasible (an assumption that I personally don't believe in) then the random interactions of basic building blocks within an early primordial soup plus external factors such as temperature, atmosphere, and lightning eventually resulted in random combinations which eventually connected to each other to form proteins and other cell building blocks which eventually formed the first cell.
They're just downvote-happy nowadays. I gained "downvote priviledge" two weeks ago and still haven't used it.
If I don't like something, I don't read it. And if the comment is legitimately against HN community guidelines, usually 5+ people have beaten me to the downvote, so I don't waste my time.