Me: So let's get this scene written!

Brain: But we can't!

Me: Why not?

Brain: Because you need to know this little tiny detail first!

Me: But why? The readers won't notice it.

Brain: But what if they do? And it's wrong? And they complain!

Me: But they might not.

Brain: But if they do?

Me: *exhales* Fine. *goes to look up details of thing*