In the end, Dean (Jensen Ackles) went out the way he always thought he would: Hunting. He was killed in the series finale while taking on a nest of vampires, but his ultimate end would come in the show's final moments, when he was reunited with Sam (Jared Padalecki) in heaven.

Yes as a matter of fact!! They actually refer to eachother as brothers and have that same relationship off screen! You can watch plenty of interviews/comic cons. Jensen is quite similar to Dean as a matter of fact whereas Jared is much more playful and energetic than his character, Sam.

Tic-tac-toe has been solved. The optimal first move is to go in the corner. As always, there is a relevant xkcd.

The first player can't guarantee a win, and the second player can't guarantee a win either. This is assuming both players make no mistakes in their moves. Therefore, neither going first nor going second guarantees a win if both players are playing their best. Tic-Tac-Toe is a solved  game.