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Headscratchers: Summer Wars
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    Having dinner is a free action 
  • Sakae's will says she wants the family to sit and eat a meal together as a family, which is a genuine Tear Jerker request. Except they all decide to do it right then, after Love Machine has taken control of a rogue satellite and has clearly announced his intentions to have it slam into a nuclear power plant, resulting in a catastrophic, Chernobyl-esque release of radioactive material. Apparently family togetherness is more important than saving millions of lives. Also, if they'd opted to eat the meal after dealing with the threat, then they would've had more than an hour to redirect or even save the satellite, as opposed to a ten minutes.
    • The worst things in this world are being hungry and being alone. They wanted to be full and together. Not the best of explanations, but they aren't a very technologically savvy family who just lost the most important member, and they had only recently started taking the situation seriously anyway. The main page pegged them as Too Dumb to Live after all.
    • Also, in the last moments, while trying to break the encryption on the satellite's guidance system, the same pattern came up: they break the encryption, you have a couple of seconds, then Love Machine puts up a new encryption. So rather than wait until they had the data they wanted to upload ready before finally breaking the encryption, then inserting it in the brief opening, they kept trying to brute force it, and very nearly getting the entire family killed in the process.
    • Kenji probably wasn't really thinking straight, since he had to focus so intently on solving each encryption (though to be fair to him, the Windows-style interface might've been such that he really couldn't do anything on the screen before pressing enter), but the dinner made sense. The scene only lasts a minute or so and they're gobbling down food as fast as they can while hashing out a new plan to fight Love Machine. The countdown started with nobody having a clue what to do next, so they were bound to need some time to figure out a strategy. They just did it over a quick meal.
      • You can't fight a war on an empty stomach.
    • The worst things in the world are being hungry and being alone. They'd just got an ultimatum that they have to do the impossible- they just didn't want to DIE hungry and alone. Alone in this sense not being literally alone, but the broken nature of the family- this moment marks the spot that everyone's really a team again and everything is forgiven. So first of all, it isn't a blank logical decision but something irrational done by a frightened family that might be torn apart within a mere two hours. But ALSO it was a good tactical decision to calm them all down and reinforce team bonds. This coming from Granny who already proved earlier that you can lead a war just by letting people know they're not alone, and nagging them to get thier head together and BREATHE for a goddamn second. She's still leading the clan onwards in war, even now.

    Longest pitching run ever 
  • Running parallel to the events of the movie is the baseball tournament Ryohei's team is participating in. Ryohei is the team's star pitcher. Instead, the movie shows Ryohei pitching four consecutive complete games, including one that goes into 15 extra innings. Considering that the tournament is said to last 10 days, not counting the championship game, the movie leads you to believe that Ryohei pitches a complete game 11 days in a row. Starting pitchers are given at least 3 days rest between starts, especially after heavy pitching days, such as a complete game, in order to avoid catastrophic arm injury, a very common occurrence with starting pitchers. Also, doesn't this team have any other pitchers?

    Koi Koi math 
  • When Natsuki starts her game of Koi Koi with Love Machine, the bid for the opening round is exactly as many profiles as Natsuki has. Each round, the betting doubles, meaning each round Natsuki is going all in. However, when she loses a round, which happens before anyone from the outside joins in, she still has profiles left to gamble with.
    • She put her entire family up as her account, but the initial hand's rate was 1 point = 1 avatar. Koi Koi was in creasing the 1 mon = 1 avatar ratio. Second hand she started at 1 mon = 10 avatars. Third hand she set the bet at 1 mon = 100 avatars. Over the course of the hand koi koi calls had brought the total to equal 1 point equals 10000 avatars, when she lost, she must have lost by at least 30 points because she had more than 300000 avatars at that point, but she didn't have a number readily divisible by 10000 and so she still had some left.
  • The last bet confused me. Even forgetting why Love Machine felt the need to bet 10 million accounts rather than stall for a while, how the hell did Love Machine lose all of it's accounts in one move when it supposedly had 400 million ?
    • Goko + Aotan + Akatan + Ino-Shika-Cho is 28 mon, plus 1 mon per additional tanzaku (up to 3, 31), likely another 4 for tsuki-fuda (35), 6 more tane would yield 5 more mon (40). Kasu could yield some more (Up to 15, 55). 40 mon is possible, just incredibly unlikely. 40 mon * 10 million accounts per mon = 400 million.
    • Since Love Machine had lost almost every hand it played against Natsuki, it probably realized that it's vulnerable against her and needed to get out of the game fast. Love Machine didn't even want to keep playing after its first win, but the world rallied to Natsuki's aid and pushed her back into the game. Since it had to play one more hand now, LM gambled on being able to win a second time and so put up everything to make sure she can't keep the game going. It didn't work, but it made sense. As for the math, though, I'll leave that to someone who knows more about Hanafuda betting rules.
      • No, rushing the game doesn't make any sense, since Love machine would literally win by stalling. The only (and illogical) reason I can think of is if Love Machine (or in this case, the writer) wanted to give the heroes a fighting chance.
      • Love Machine wouldn't win by stalling. It hadn't set the satellite to hit their house yet, and it probably couldn't change the trajectory until it was free from the game (that might be another reason it made that bet - win or lose, it wanted to get back and set their house as the new target before the satellite hit the atmosphere). There's also the possibility that Love Machine was simply bored with the game, since it wants new information and Hanafuda had stopped being a novelty.
      • LM is also shown to be extremely competitive and unwilling to back down from a challenge until its opponent is completely defeated and absorbed.
      • If Love Machine didn't raise the stakes to all-in, Natsuki would have, now that she had enough avatars to cover the wager.
  • This isn't really about the math, but how does everyone on Earth know the rules of Japanese hanafuda?
    • Everyone on OZ is literally a click away from a browser window. They looked it up as soon as they found out what was going down.

    What was the military thinking? 
  • Why the hell did the U.S. military decide to release Love Machine into OZ as a test? I mean, seriously, the thing is used by most world governments and businesses. Unless you plan on crippling the entire world (including YOURSELVES) during a war, that isn't a good testing ground!
    • They seriously underestimated what Love Machine could do and wanted the plausible deniability that anonymously releasing it into Oz would provide. They probably thought they had a killswitch to stop Love Machine once the test run was finished, and one of the first things Love Machine did was disable it.
    • The test was probably to see if Love Machine could get into OZ at all. The military wanted to see if Love Machine was clever enough to compromise OZ, presumably so they could use it to watch the world's business and government transactions from the inside. Love Machine's strategy at the beginning was admirably low-key and subtle, just as an intelligence agency would want. After it got in, however, it revealed why it was completely and utterly unsuited to clandestine work; it had a flair for the dramatic, a major power complex, and a vindictive streak a mile wide. Who would have expected that from a brand-new AI? Besides every sci-fi fan ever?
    • Was it ever stated that Love Machine was released intentionally? Maybe it just broke out on its own.
      • Yes, Wabisuki said the Pentagon used Oz as a test for Love Machine.
      • That doesn't necessarily mean that's how it happened. Wabisuki also said that all he did was develop the thing (as well as sell it to the pentagon). That doesn't mean that he was privy to what they did with it after they bought it.
      • Exactly; in light of recent revelations from Edward Snowden about JUST how much crazy shit goes on behind the President's back (eg., bugging Angela Merkel's phone, along with those of millions of EU citizens that Obama apparently didn't know about), it's entirely possible that the NSA or a similar organisation, knowing that there was no way in Hell the President would officially sign off on such a thing, clandestinely leaked Love Machine onto the 'net by themselves and subsequently covered it up.

    Love Machine's first avatar 
  • Why did Love Machine take over Kenji's avatar in particular? Kenji didn't solve the equation that gave him access to OZ, there isn't any reason to use his account aside from providing a Red Herring.
    • Unless I'm remembering this wrong, in the discussion that revealed that Kenji got the equation wrong, it was stated that Love Machine took control of any account that responded to the equation, whether that person actually solved it or not.
      • But even then, it only manifested as Kenji's avatar, and Kenji was the first suspect, even though others had solved the equation. Plus, when Natsuki won back the stolen avatars, the only ones that remained were Kenji's and possibly the original account. Why not retain a more useful account, like a government official?
      • Kenji might have been the first person to respond, and so he was the first account Love Machine hijacked, which locked it in as the default avatar (there might also be the original account, but it's probably a classified military account that doesn't have an Oz avatar).
    • Its original account might be the whole 'Cheshire cat smile' thing rather than a separate existence as such. At the end it only has two accounts, and appears yet again as Kenji's corrupted avatar.
    • Kenji may have been the only OZ administrator to respond; that was his original summer job. Even if he was a low level administrator, the easiest way to compromise a security system is from the inside, so law enforcement would instantly be suspicious of Kenji if Love Machine used his avatar.
    • Alternatively, Kenji had terrible, terrible luck.

     Oz having everything on it 
  • Come on, you have to think of international security and such. Especially since they appear to hire high school/college kids as their admins and you can apparently get missile access if you go deep enough. I'm sorry, but what world leader would give their Oz account that much power?
    • The same kind of world leaders that put highly sensitive information within reach of the real world's Internet. Our leaders, in fact. Part of it is convenience; why build your own Internet (or OZ) when there's a perfectly functional one already there? note  Missile access is indeed going a little far, but remember that most of our characters, and specifically the one doing the explaining that mentions the missile access, are high school students and therefore not omniscient. He may be exaggerating. It may also be that the world leader's OZ account itself doesn't have access to missiles, but masquerading as that world leader via the OZ account could. Somehow. In some convoluted fashion.
      • Extra Credits had an episode about MMOs, and said that someday, there might be the first attempt at integration between the Web and Real Life, completely breaking the barrier between those two worlds. Summer Wars is basically what happens if we go too far with it...

     John and Yoko, hacker immunity? 
  • I was always curious about that. John and Yoko are the Guardian Angels of OZ, whatever that's supposed to mean. While having his fun, he was messing with literally every aspect of OZ available. Why were our whale buddies never targeted in his antics? The two might have very well delivered one of the final touches for Natsuki's victory with the auspicious rare item. So, why didn't the botnet go after them?
    • [1]. John and Yoko were probably viewed as harmless NPCs that only greeted anybody who went into OZ. Love Machine probably saw them as no threat, and didn't attack them. They basically did nothing throughout the entire movie except grant Natsuki the rare item. Plus, they were simply part of OZ's code, like many NPCs in real life, and don't even affect anything important in OZ in any way.

    Combat in Oz 
  • It's stated in the intro to Oz that every avatar is totally customizable. So what's the point of combat when you can make a character who, I dunno, can make themselves perfectly invincible in some way (i.e., made of some sort of slime that can't be cut, bludgeoned, or burned)? On that note, how would one translate the moves of a certain style of combat to typing on a keyboard?
    • You can't make yourself invincible. Simple as that. Or, if you can, it's not legal to use in the tournaments. Love Machine specifically doesn't cheat, because it likes playing games.
    • It's possible that Kazuma's just typing exactly what his character in Oz should be doing, from his knowledge of how to move that way in the real world. Like, "swing left right jump punch kick backwards duck swing left" etc.
      • HO! Ha-HA! Guard! Turn, Parry! Dodge! Spin! HA! THRUST! Sorry, couldn't resist...


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