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What would you do?

I'd say that someone who espouses pseudoscience is not qualified to be working in a related scientific field.

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Are you comparing intelligent design to believing the earth is flat?

As both are unscientific -- the US legal system agreeing that this is so -- then the analogy seems apt, though admittedly flat-earthism is a more extreme example.

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I think evolution is more comparable to a flat earth belief. The bible tells us flat out that the earth is a sphere. evolution says nothing about it.

There appears to be a lot of debate about whether the Bible says the earth is flat or round. Look here and you will see claims that the Bible says it is flat. I'm not saying I agree. Personally I don't care. But it would seem that the matter among Biblical scholars is far from clear.

Evolution says nothing about it because evolution is how life on earth has changed over time.

I went to a Catholic church for many years and they never said the earth was flat. They never espoused creationism either. These comments are deflecting attention from the various issues under discussion here.