My understanding is that JAD fully accepts the mainstream thoughts of the Earth's 4.5 billion year age.
He also accepts that biological evolution has happened in the context of that time frame. But, as I understand it, he thinks that evolutions pathways were pre-programed to end up where we currently are. He also thinks that evolution is no longer happening. I keep meaning to ask him when evolution ceased.
But all this is (shame on me) pretty off-topic. I suggest you track down JAD somewhere and ask him about positions.
Moose
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