What I’d like to know is how many evolutionary events define the transition from this “pre-human species” to the human species.
And what were the specifics of the genetic mutations forming these evolutionary events?
It’s all speculation. A clear fossil record exists for everything but the evolution of man as described by those who believe we descended from apes.
It’s like global warming. The evidence does not support it but they latch onto any event they can or distort the facts to fit their belief.