It’s like playing football. No one person can win the game on his own. Each player does his part to determine whether the team moves forward. The center snaps the ball to the quarterback, who hands it off to the half-back, who runs through a hole the offensive line has created in the the other team’s defenses. Or maybe the quarterback passes the ball to a receiver. Occasionally, the receiver is on a different page than the quarterback, and when the ball is thrown, there’s no one there to catch it. The play falls apart. Players either work together, or they lose the game. In football speak, this is called “not executing well.”