I'm an atheist, yet I don't think science can answer why we exist and what is the meaning of life. I think those questions are syntactically valid but semantically invalid. We kind of (in the 'broad strokes' you say) think () we know how we got here, how life got started, etc. But why? How do you know that? It's an honest question because, again, I don't think that question makes sense so I'd love to know your take on it.
() I say we think we know because I'm actually agnostic (I typically say 'atheist' because it stops some conversion attempts I'm not looking for from even starting, judging by your two comments on this thread I reckoned I can give you the honest answer as you won't try to convert me into anything!) and I believe we can only know what we conclude from the information collected by our senses and our thinking process after that, but an error in either the information collection (think of how the first scientific estimates of the age of the planet were off by a long shot on account of choosing a poor thing to measure -- I'm thinking about the work of Halley here) or in the thought process would result in bad knowledge, and it seems to me there's a part of the scientific-minded population right now that has a blind spot for this: there's overconfidence in science.
() I say we think we know because I'm actually agnostic (I typically say 'atheist' because it stops some conversion attempts I'm not looking for from even starting, judging by your two comments on this thread I reckoned I can give you the honest answer as you won't try to convert me into anything!) and I believe we can only know what we conclude from the information collected by our senses and our thinking process after that, but an error in either the information collection (think of how the first scientific estimates of the age of the planet were off by a long shot on account of choosing a poor thing to measure -- I'm thinking about the work of Halley here) or in the thought process would result in bad knowledge, and it seems to me there's a part of the scientific-minded population right now that has a blind spot for this: there's overconfidence in science.