3. Changing History

Perhaps the writers were trying to misdirect the audience by making us believe that history can’t be changed, so that maybe we wouldn’t accurately predict the ending.

textWarner Bros

My goofy prediction was that the movie would end with both Alex and Kate standing at each others’ graves.

Whatever the rationale – or lack thereof – was, the idea of time stability is thrown out the window when a tree appears out of nowhere. Let me explain: Kate complains about the lack of trees around this apartment building which is under construction, so Alex, who is working on the building, plants a tree there at night and tells her about it. This prompts Kate to walk up to the building, also at night for some reason. As usual, there are no trees… until suddenly, there’s a flash of lightning, and the now fully-grown tree appears right before her.

Just imagine what may have happened if she'd been a little bit to the right.Warner Bros

Just imagine what may have happened if she’d been a little bit to the right.

This… changes everything. Firstly, why did his actions change the future at that specific point in time? Why did it happen just when Kate was looking for the tree? Secondly, why does Kate still remember a time when no trees existed on the property? No doubt, it’s implied that everyone else now believes that the tree has been growing there for two years. In fact, it had to be there for two years in order for it to grow. I suppose we can assume that Kate’s memory is unaffected because she is under the influence of the magical mailbox, but still.

The best theory that I heard – and I apologize, for I cannot remember who among us proposed it – was that perhaps the tree was there all along, but Kate could not see it, because she needed to make the comment about the lack of trees in order to prompt Alex to plant the tree in the first place. In other words, if Kate hadn’t complained about the lack of trees, then Alex would never have planted that tree there.

This theory, though, however reasonable it may seem, is utterly shattered in the third act of the film.

Long after Kate has abandoned Alex because he “stood her up” for a dinner reservation which he set for a date two years ahead of his time, Kate is with her boyfriend – you know, the kind of guy in these movies who is always the unreasonably wrong choice – talking to an architect about building a house. The architect turns out to be Alex’s brother, who, in the course of conversation, lets loose that Alex died in a bus accident. A bus accident which Kate witnessed toward the beginning of the movie.

Aw shit, I already used this pic for a bad joke. Maybe you won't notice if I just use it again.Warner Bros

Aw shit, I already used this pic for a bad joke. Maybe you won’t notice if I just use it again.

So, obviously, Kate has to change the past. She returns to the lake house and mails a letter basically warning Alex not to get murdered by a bus. And, as she stands there… Alex shows up. Because he got her letter, and didn’t get hit by the bus.

But wait a minute.

Alex did die at the beginning of the movie… We saw it. Kate saw it. She still has the memory of him dying. She literally just talked to his brother, who confirmed his death. That’s… completely different than a tree just appearing, because maybe some magical force prevented you from seeing it in order to fulfill destiny or some shit. Time has literally changed here. And, again, Kate is the only person who knows. If she went back to talk to the architect again, he would undoubtedly not remember the conversation.

But… if time has truly changed, and Alex never died… then Kate would have no reason to send her final letter, preventing Alex from dying, because he would never have died in the first place. This is what is known as a grandfather paradox. If someone went back in time and killed her own grandfather, she could never have been born, and thus could never travel back and kill her own grandfather. Perhaps more appropriately for our case, if one were to go back in time and kill Hitler, then the urge to kill Hitler would never exist, and thus the individual would never have the reason to go back in time and commit the deed. It’s a paradox because it contradicts itself.

There are two possible ways in which this could happen. The first, far sillier option is that there is only one timeline, and Kate and Alex’s actions are actually changing history… somehow. It’s illogical when you think about it, but it seems to be the concept which most laypeople default to understanding, probably because the human mind is built to be very linear. I don’t doubt that the writers of this film (and, for that matter, the writers of the original Korean version) probably gave no thought to the logistics of time travel when putting together this romantic drama. The second, more rational option is that there are…

4. Branching Timelines

Okay, so this should be straightforward, but I’ll go ahead and explain. In the original timeline, Alex has no correspondence with Kate. Kate arrives at the house and sends a letter to the previous occupant through the mailbox, which goes back in time and is delivered to Alex two years in the past. This creates a new, offshoot timeline in which Alex receives that letter from Kate. In this new timeline, Alex places a letter in the mailbox. This letter goes forward in time to reach Kate two years in the future. When Kate reads it and responds, at the moment at which the letter goes back in time, yet another new timeline is created. Thus, every time Kate places a letter in the mailbox, she creates a new, offshoot timeline. Presumably, whenever Alex sends a letter through the mailbox, he never gets another reply from Kate in that timeline. It is only when Kate finally receives the letter, two years later, that she sends her reply back, creating a new timeline in which Alex receives a letter from her.

The tree is a metaphor for branching timelines, because it has branches. Unless it's a metaphor for love or some shit, I guess.Warner Bros

The tree is a metaphor for branching timelines, because it has branches. Unless it’s a metaphor for love or some shit, I guess.

There are so many branching timelines if we abide by this theory, it’s just nuts. But it works. It accounts for the tree appearing, sort of – when Alex plants the tree, he creates a new timeline. Although… it doesn’t explain why Kate literally watches the tree manifest, or why she would remember there being no trees in this timeline. Furthermore, if Alex’s planting of the tree were to create a new timeline, then Kate would never have a reason to send a letter regarding the lack of trees.

Okay, okay, but at least it would explain how Alex is saved – he really did die, just in a bunch of earlier timelines before he and Kate created a new timeline in which he doesn’t. But… Kate still remembers. She still remembers him dying.

No, none of this makes sense. It’s clearly just one timeline, which doesn’t make sense but whatever. Unless time takes the form of some kind of incomprehensible yoga-like position in this universe, it seems to be just one timeline, which Kate and Alex are irrevocably altering.

Look at these two, not giving a fuck about time stability. One little mistake and they'll butterfly effect us all into fish mutants.Warner Bros

Look at these two, not giving a fuck about time stability. One little mistake and they’ll butterfly effect us all into fish mutants.

The problem here lies in the box in the attic.

At no point does the box just manifest in front of Kate, as does the tree and, well, Alex’s non-deceased state of being. The box is already there in the past when Kate gets there. It’s part of what prompts her to write her first letter. But in writing this letter, she influences Alex’s decision, in the past, to leave that box there. That just doesn’t seem to fly with the notion that the past is changing. It’s closer to an ontological paradox.

We could argue that Alex didn’t think about the letter when he left that box there, but what other reason would he have to leave it there? Furthermore, he was still thinking about Kate and trying to get back together with her, as evidenced by the fact that he built that book into the floor of the apartment he knew she would end up renting – which, by the way, seems to manifest like the tree, because how else would Kate miss that hollow floorboard in the middle of her room for so long until it’s plotwise convenient for her to find it?

If that box alone isn’t enough to prove the inconsistency here, there’s also the fact that Kate remembers her first kiss with Alex… which only occurred because he’d been corresponding with her via the magical timey-wimey mailbox. Following the logic of the tree and the prevention of Alex’s death, she should never remember having met Alex. Until…

Oh, fuck.

Until he mentioned the event in a letter.

This is bullshit, I’m done.

…It’s not a bad movie, though. Just focus on the romantic drama and don’t try to figure out the logistics behind it all. I’m pretty sure that’s exactly what the writers did.

In the end, they porked, and that's all that matters.Warner Bros

In the end, they porked, and that’s all that matters.

Images courtesy of Warner Bros and HBO.

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