Following up on this, a recent installment of Homestuck included something that can only be done in speculative fiction, and I want to savor it by analysis:
Dave grew up with an abusive guardian who died before Dave got the chance to come to terms with his abuse. In this scene, he finds himself face to face with Dirk, an alternate-reality version of his abuser. While Dirk has technically never done anything to Dave, he’s already acquired the behavior patterns that could lead him in the same direction.
For the first time, Dave gets to vent some of his justified anger. Dirk not only looks and feels like Dave’s guardian, he also intuitively understands his other self’s cruelty and feels partly responsible. And because he’s not that other self, Dave can eventually forgive him, learn to trust him, and even ask him for the comfort and affection he never got as a kid.
If Dave had tried to reconcile with his actual abuser to this extent, he would have likely have gotten burned again. But with Dirk, he has a chance of starting over on his own terms. They’re even the same age this time. It’s an amazing scene of catharsis and the best kind of wish fulfillment.
How would a realistic narrative do this? I suppose Dirk’s role could be filled by a twin sibling or a son. Or Dave’s guardian could suffer a traumatic brain injury that makes him effectively a new person. Or the cathartic confrontation could occur in a dream sequence or a hallucination or a story within the story. But these are only approximations of the thing we’re trying to do, a thing that Homestuck offers in its purest form.
Compare the quasi-redemption at the end of “Bullet in the Brain,” which is made possible only by messing with chronology.