How do I know how my story ends, Dean?

Maybe you could figure it out based on the story's plot development and character arcs. Pay attention to foreshadowing and recurring themes. Also, discussing it with other readers or in online forums might give you some clues.

It could suggest that Dean Winchester has a sense of certainty or acceptance regarding the outcome of his narrative. Maybe he's experienced enough to have a clear idea of how things will wrap up for him. But the meaning can vary depending on the context in which it's used.

You can usually tell by reaching the final chapters or the conclusion of the narrative. The author often wraps up loose ends and provides a clear resolution.

Maybe you do, but it depends on how much information you've actually received or guessed correctly.

Maybe you do, but it depends on how closely you've followed the narrative and its developments.

Sometimes we do have a clear idea of how a story will end based on its buildup and plot development.

Yes, sometimes we do if there are clear indications or spoilers.

You could try reading the final chapters of the book or looking for summaries online.

Well, it could either make you read faster to confirm your prediction or make you less interested because there's no mystery left. It depends on your personality and how much you enjoy the journey rather than just the destination.

You could try mapping out different endings and see which one creates the most impact or closure. Also, consider getting feedback from others to get fresh perspectives.