You seem to be describing a stereotype and not an actual person, and also that seems to be conflating it with an actual view on religious beliefs (atheism). So I can't say I know what you mean.
But this feels like describing the colour blue - if you don't already know what it is, being on Hacker News, I don't think I can help you. Familiarising yourself with the philosophy of science (like Karl Popper's ideas for a start) and then looking at the way that many redditors and HNers talk about science (especially pop-science in astronomy and physics) or treat whitepapers, "new study finds" journalism etc would make you notice the difference.