A strawman approach, or argument, is a tactic often described as a logical fallacy. It is the practice of presenting a simplified and often inaccurate summary of an opponent's views, then attacking that summary and concluding that you have thereby won the argument. The problem with it is that the presenter usually does not accurately represent the opponent's views, so what he is attacking is actually a "straw-man", not the actual thing itself.
Bowman used it twice in this thread, the same way. He set up young-earth creationists as the opponent, characterized their views negatively, summarized them inaccurately, then attacked his summary as though it accurately represented the views of y-e-c'ers. And it appears that he believes he has adequately refuted their beliefs, which he hasn't.