It's hard to tell sometimes. My characters face that dilemma when they encounter the mysteries and difficulties I put them through. In a story, making a choice changes everything. It's often a hard decision for the characters and the author! Each choice has a ripple effect to the last chapter. It's these opportunities that can make life—and stories—fascinating.
"Two roads diverged in a wood, and I—
I took the one less traveled by,
And that has made all the difference."