> Nothing in Blindsight says "there can't be a God"

I feel this is missing the point that OP is trying to get at. I wish I could cite Blindsight more accurately, but it's been a long time since I read it.

I don't think OP is suggesting the characters in the book sit down and reminisce about the time scientists proved there's no god after all, ha ha weren't all those believers silly all those years.

But Blindsight I found to be deeply nihilistic about the place of "humans as we know them". Whereas religions affirm that humans as we know them are somehow cosmically special due to their relationship with God, Blindsight posits they're just a weird blip of biology destined to be outcompeted.

I wouldn't necessarily call it atheistic so much as ahumanistic. It seems to focus on survival, power and force, and feels like it denies, rather than affirms, any sense of our own worth.

I may be overstating the case; again it's been a long time since I read it. I remember having, as some other posters have a said, quite a depressed feeling after having finished it. I didn't hate the book, but I didn't feel like I'd learned anything that would improve my life. Other than having had the chance to grapple with challenging ideas- which is better than having read something with no intellectual stimulus!