[BeetleB]

>Scientists develop evidence-based explanations of phenomena through experimentation using available tools.

In matters of their expertise. I'm guessing your fellow coworker is not a biologist.

If you think most scientists apply this to all their beliefs, then I think you should spend more time amongst them. Virtually every physicist I worked with in a top 10 school had some stupid belief that was easily invalidated with a few days of research. For me to judge their analytical abilities based on silly beliefs they have would be saying more about my abilities than theirs.