@Michael as said, cosmology is not my wheelhouse, so I'll bow out of that discussion.
The lack of belief in deities poses a new problem for atheist, the new problem is answering the question as to why we're all here.
How do you answer that question, though? Believe me, I am most certainly interested in the answer to that question. It's an important question! So important that I'm not willing to accept an answer that is just
there. The answer has to be demonstrably correct. And "Because a deity wants us to be there" is not demonstrably correct in any meaningful sense.
So you accept the answer that there is no answer to life?
I didn't say that, nor did I imply that. I do not
know if there is some objective outside meaning to life. I'm going to keep looking for one that is justified.
You can solve the problem of hard solipsism with belief. We must believe that objective reality is absolute and not dependent on our minds to exist. We must believe that other people are conscious like ourselves. We must believe in God in order to experience God. Makes sense to me.
But simply believing something does not make it true. I could believe as hard as I wanted that aliens were going to abduct me and that still wouldn't cause them to swoop down and take me. We can believe all we want that our objective reality is true, but that does not necessitate it being true. Even if our beliefs somehow
warped the reality we experienced in such a way that I could believe really hard that the bottle in front of me is not empty and the bottle became full, that still would not make my reality involving the bottle any less subjective.
Right, it's obvious to each one of us that we are each conscious, but it's not obvious that anyone besides ourself is conscious, which is why it requires belief that others are conscious. Belief solves all philosophical problems.
Actually, no, it doesn't. Your belief that, say, I am conscious, does not necessarily grant me consciousness. Belief does not solve this problem. The way I resolve the problem is that it is irrelevant whether anyone else is actually conscious, or merely simulating consciousness to an extreme degree - I still am forced to interact with them as if they were. Pragmatically, it makes no difference.
So you "believe" neuroscience can answer the philosophical problem of consciousness, even though you just previously stated that we must accept that a tentative understanding of reality is the best we can do. Seems like you're contradicting yourself. You're believing in something that hasn't been proven yet, but then you're claiming you're an atheist because you lack belief in what has not been proven.
Because a tentative understanding of reality is
all we can muster. At a certain point, we are forced to
live our lives. If you waited on absolute certainty before doing anything, you would never do anything. What we do is make models of reality in order to better understand it, and so long as we hold certain things. What's important is that this tentative understanding has a consistent, reliable basis. Science, empiricism, and our senses have a tendency to do this fairly well,
as far as we can tell. No other method offers similarly good results.