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[[folder: Escaping the portal]]


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* Because none of those plans would've been fast enough. (Also because it's never shown that the ticket fists can be activated remotely.) Even with the plan they went with, the portal explodes mere ''seconds'' after Hiro emerges safely from it. Trying to implementing any other option would run the risk of killing Hiro and Abigail for the sake of trying to save a healthcare robot who's expendable and can be rebuilt. Baymax was programmed to ensure the health and safety of his patients - he's not going to attempt, suggest, or allow a course of action that puts them in significant danger just to safe himself.
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* You would think that a boy genius like Hiro would be familiar with Newton's Laws of Motion - an object in motion will remain in motion unless acted upon by an opposing force, for every action there is an equal and opposite reaction, the total of forces on an object equal the object's mass multiplied by the vector sum of the accelerations applied. In the frictionless, gravity-less, wind-less environment of the wormhole void, all they would need to do get back through the portal would be to apply a force towards the portal. Since Baymax is basically a balloon (ie. gas under pressure, retained by an elastically flexible container), and Disney have already shown us that they don't mind making an extended fart gag, why not have Hiro rip a hole in Baymax's backside? The exiting gas would have applied force towards the portal, and all three of them would have floated safely through. If that wasn't fast enough, Baymax has two hands - he could position his body such that his shoulders were pushing the pod, detach the rocket fist and give it to Hiro, who would hold onto it with the electromagnets in his suit, then Baymax could grab Hiro with his remaining hand, and remotely activate the rockets; such a solution would in fact be more controllable than the free-flying rocket fist, as Hiro would be able to change the angle of the exhaust if necessary, negating the need for Baymax to line up a perfect shot.
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** Well, it probably classes as unregulated gambling.
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* At the time, all they ''knew'' about the plan was that Callaghan had stolen the microbots and was using them for rebuilding the portals, and was willing to kill them for seeing too much. They didn't know what he planned to do or his motives. In the accident Callaghan caused, Tadashi ran back into a burning building. Callaghan was deeply insensitive in his words to Hiro, but he certainly never intended for Tadashi to die. They beat him. Yet Hiro ordered Baymax to kill him even though they could have just handed him over to the cops and stopped any destructive plans dead in their tracks. You ''can't'' let a 14 year old boy make a decision like that - it would follow him through his entire life.
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* Simple answer - the Three Laws of Robotics. Law One: Baymax is programmed to keep his patients safe. Law Two: Baymax cannot obey orders that put his patients in danger. If he obeyed Hiro's plea he would seriously increase his risk of being trapped - indeed Hiro does barely make it out. Law Three: A robot should prolong its own existence as long as it doesn't conflict with laws one and two - so Baymax puts his personality chip in his fist thruster. As a robot he can be entirely rebuilt by somebody who considers him very important.
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** Sounds like you answered your own question - the hypersleep was probably put in as a failsafe in the event of an emergency, that would keep the passenger alive until a rescue mission could be mounted. Which means Krei ''didn't'' cut corners like Callaghan said he had, since everything was with the safety parameters and they had the necessary failsafes in place. The only issue was that the project was shut down immediately after the accident.

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** Sounds like you answered your own question - the hypersleep was probably put in as a failsafe in the event of an emergency, that would keep the passenger alive until a rescue mission could be mounted. Which means Krei ''didn't'' cut corners like Callaghan said he had, since everything was with within the safety normal parameters and they had the necessary failsafes in place. The only issue was that the project was shut down immediately after the accident.
accident, before any attempt at a rescue could be made. (If anything, this begs the question of why the government-dude never considered a rescue.)
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*** Why would they bother? Two things: 1. They're looking to find the man in the mask, and the scan will lead them right to him, ''no matter who he actually is''. Knowing 100% whether it's Krei or not is immaterial to the task of finding him. 2. Krei is their only suspect, and once the realize he's a possibility, they immediately conclude that it's definitely him. They see no need to confirm something that, to them, is the only possible answer.
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*** Okay, so they couldn't get close enough to scan him, but what about researching some of his medical information and comparing it to Baymax's scan?
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** Sounds like you answered your own question - the hypersleep was probably put in as a failsafe in the event of an emergency, that would keep the passenger alive until a rescue mission could be mounted. Which means Krei ''didn't'' cut corners like Callaghan said he had, since everything was with the safety parameters and they had the necessary failsafes in place. The only issue was that the project was shut down immediately after the accident.
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** Hiro does point out that the sport itself isn't illegal, just making bets on it. No idea why that is, though.
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[[folder:Bot fighting being illegal]]

* Why? I can't think of a reason why it should be.

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** His suit fully covers his body including his ankles in the TV series.
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[[folder: How did Youkai know that Hiro and the others would be there?]]

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[[folder: How did Youkai Yokai know that Hiro and the others would be there?]]
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[[folder: After-hours college]]
* Wow, that college sure is busy after hours when Hiro gets shown around! None of the team are out doing at-home stuff.
** Anyone who's worked with or known the type of super students the [=BH6=] are know that this is not unusual.
** Super students aside, most college labs are active at night, since most students have a day job to put themselves through college and do most of their work in the evenings.

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[[folder:Interfering with the microbots]]

* Hiro knows how the microbots work better than anyone, but he doesn't even consider building a device to interfere with or override Yokai's control of them.
** Hiro is too fixated on his revenge on Yokai, and can't see past it to get the idea of tackling Yokai's control of the microbots instead of getting at Yokai himself.
*** Besides, who knows how long it took Hiro to build that transmitter.
*** Additionally, given the fields he exhibited for the microbots such as construction and transportation, Hiro likely programmed the transmitter with a very powerful signal to prevent interference or disruption as a safety measure. It wouldn't do for some unforeseen event disrupting that transmitter's signal if the bots were being used to build a structure. Everything would collapse immediately and someone could get hurt.
*** Yokai, being a brilliant scientist as well, likely built extensive safeguards into his controller to prevent such an override from occurring.

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[[folder:Multitasking]]

* At the climax battle, [[spoiler:Yokai somehow manages to focus his thoughts on making the microbots do seven (and rather huge) different tasks simultaneously: piecing together the portal as well as attacking each individual [=BH6=] member in different ways.]] The guy must surely be the king of multitasking.
** He's a genius who teaches geniuses and has a will powered by revenge. Not unlikely.
** Also, if you pay attention to how he attacks, you'll notice he focuses on one member at a time. Once he has them contained, the bots then just slowly close in on them and Yokai switches focus. He grabs Fred's limbs and starts stretching him, he encases [=GoGo=] in a ball, he sandwiches Wasabi between two building panels, and buries Baymax under the bots (and Hiro not only can't do anything without Baymax, but he was dealing with the "reverse gravity" from the portal). All of this, while focused on trying to skewer Honey. Having the bots do a big task is one thing... having them do several large tasks, slowly and steadily without interruption is still somewhat hard, but certainly easier than doing all of it at-once. It's once each of [=BH6=] breaks out of their containers that the situation starts falling apart for Yokai.

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[[folder:Neural interface]]

* The thought-controlled interface for the microbots, which is glossed over to an absurd degree if you understand anything about the engineering challenges involved. That the neural interface works so smoothly is considerably more impressive and with far wider applications than the microbots themselves, but nobody even remarks on it.
** It's probable that Hiro simply adapted a pre-existing neural interface technology to the microbots, given that no one is especially impressed by it.

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[[folder:Raw materials]]

* Where did [[spoiler:Yokai get the raw materials to mass-produce hundreds of millions, if not billions, of small electronics? And where does he keep them? How can he sneak up on people with a swarm of billions of robots following him around?]]
** It's implied that [[spoiler:Krei]]'s abandoned island-lab is being used as his base of operations until his scheme is ready to be implemented. And most of his sneaking around is done during the night and is implied to be done through areas like docks and industrial areas which are pretty much ghost-towns at night. Though how they were able to have a car chase through such a bustling city -- even in the dead of night -- without any members of the public seeing it remains a mystery.

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[[folder:Battery]]

* Baymax's battery runs low after a few hours of adventuring. What kind of battery did he get to let him fly for hours, use weapons, etc without considerably adding to his bulk?
** This actually is touched on when Hiro initially meets Baymax. While Hiro is examining his older brother's robot for the first time he comments and tests Baymax's knowledge while asking Tadashi a series of questions as well. The only concern that remains unanswered by Tadashi is a suggestion that Hiro puts forth about the battery.
--->'''Hiro:''' Hey, what kind of battery does it use?
--->'''Tadashi:''' Lithium ion.
--->'''Hiro:''' You know, super-capacitors would charge way faster.
--->'''Tadashi:''' Huh.
** Given that Hiro was able to put forth a suggestion within a few moments of analyzing the robot, it is hardly inconceivable that he was able to upgrade the battery. That and it is definitely possible that the armor had its own power source that linked with Baymax, much like how the sensors worked with and boosted the robot's initial scanning capabilities.
** The thing is, while Hiro was right that [[ShownTheirWork super-capacitors would charge much faster than lithium-ion batteries]], they would also ''discharge'' faster. It's possible that while Hiro was working on the microbots, Tadashi took Hiro's advice and swapped out Baymax's batteries for super-capacitors, not knowing that Baymax would need long-term power as well as short-term when Hiro accidentally sent him after Yokai's factory. And when Hiro finally upgraded Baymax into a fighting robot, he ''put back'' the Li-ion batteries as a secondary power source.

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[[folder:Skeleton]]

* How can Baymax deflate and "wrap" himself up to such a tiny space with that carbon-fiber skeleton inside?
** The simplest answer is that it's built to be collapsible.

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[[folder:Too big]]

* Baymax is huge and cuddly. But he's hardly suited for performing surgery. He's kind of like a "First Response" guy that would be great to help injured people until they get to a hospital. HE EVEN FITS INTO A BRIEFCASE. So he'd be used in ambulances to assist a paramedic so that you only needed the one and a driver, and sold to construction companies to be on the scene. Because he's big, he'd be good for crowd control. So he really WOULD help a lot of people. He's just not suited specifically for hospital use.
** He might not be able to work trauma or surgical units, but he could be a big help on the hospital floors, where he can monitor patients' vital signs and determine/dispense medicine or call for a consult if human help is needed. By the same token, he'd be great for working in nursing or rehabilitation centers, where he could serve much the same function.
** All that aside, it seems like the true breakthrough is the instant-diagnosis EverythingSensor medical scanner. Stick one of those in every hospital bed, exam room, and triage center in the country and everyone's job suddenly gets a lot easier, balloon robot or no.

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[[folder:Hypersleep]]

* The Teleportation Pod Callaghan's daughter is in having a hypersleep function seems kind of weird, don't you think, given that it was only required to go about two feet? But then you get to pondering about how the portals were protitypes for a transportation system, so obviously they'd need a prototype vehicle, too. And such a vehicle would need to be equipped with a hypersleep function in the event of an emergency, regardless of trip length.

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** Crazy thought here -- maybe, just maybe, a bunch of college kids and science nerds don't like the idea of killing someone and might, ''just might'' consider murdering someone in a fit of vengeful rage to be kinda sorta a bad thing. I know, wild, right?
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**Comedy
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**It's possible the writers had [[https://en.wikipedia.org/wiki/Three_Laws_of_Robotics the laws of robotics in mind]], all of which have to do with forbidding robots from harming human beings. Surely robotics students would be familiar with them?
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**There's an unidentified framework on the ground behind the scientist who catches the hat, it looks like a catch net similar to those used to stop fighter jet momentum when they land on their aircraft carrier. So odds are the machine would have unfolded, spread the net and caught the pod as it exited if the test had been successful.
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* In the animated series, the gloves' electromagnets have been modified to both attract and repel, with the result Hiro can move around metal objects at will. For example, if a metal beam is thrown, he can pull it towards him or cause it to fly away into the sky. If he sets the magnets into overcharge mode and the object is light enough, he'll launch it really high.
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** And even if we ignore all these explanations, does that really excuse how callous the man was being? You don't just say something like that to a grieving family member, and not only was it basically him punching Hiro in the gut, but he was being pretty darn ungrateful, too, considering the only reason Tadashi went into the building was to save Callaghan.
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Added a response to the question about Hiro's self-esteem.

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* I don't think Hiro has self-esteem issues at all. In fact, there are times in the movie where he seems downright cocky.
** To your point about him only being friends with Tadashi's group...he's a kid genius who spends all of his time engineering bots and illegally betting on fights which he swoops into and dominates. It would be awfully difficult for him to make friends with average 14-year olds who aren't as intelligent, so it makes sense that he bonds with his brother's friends.
** As for him acting like Tadashi...that's his big brother. He's a young boy who idolizes his big bro, who we see established as a pretty amazing guy (smart, kind, heroic). It makes sense both realistically and story-wise for him to emulate his brother (esp the lessons he learned from his brother about thinking outside of the box and being heroic).

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** They probably don't know ''how'' the portals work. Krei isn't a super-villain, but he can be reckless and uncaring. He may have rushed production without understanding what they were building, and then killed the whole project to cover his ass.
** It may not have been his decision. It seems like the project was military funded, so some governing committee might have decided it wasn't worth the risk of rebuilding to save one person when they would risk more deaths if containment failed again. They would also have to research why containment failed and how to fix it; that would mean time the pilot doesn't have. It's harsh, but they probably made the best decision assuming she died and just scraping the project.
*** After the accident, you can hear the general telling Krei to dismantle the project and quarantine the island.

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** They probably don't know ''how'' the portals work. Krei isn't a super-villain, but he can be reckless and uncaring. He may have rushed production without understanding what they were building, and then killed the whole project to cover his ass.
** It may not have been his decision. It seems like the project was military funded, so some governing committee might have decided it wasn't worth the risk of rebuilding to save one person when they would risk more deaths if containment failed again. They would also have to research why containment failed and how to fix it; that would mean time the pilot doesn't have. It's harsh, but they probably made the best decision assuming she died and just scraping the project.
***
After the accident, you can hear the general telling Krei to dismantle the project and quarantine the island.



*** At the end of the accident, the Air Force officer that looks like General Hammond ordered the facility to be put off limits and the project discontinued.



* Baymax explicitly states that Abigail is in suspended animation.
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** In addition, Callaghan's using some pretty distinctive technology. Hiro realizes that the person who stole his nanobots also set the fire pretty quickly, but he never realizes it's Callaghan until the island. If Callaghan had "stayed alive," Hiro or his friends could have suspected Callaghan and went to the cops.
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Cute but not really helpful


** AWESOME.
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** The portal used in the test run is probably the final, more compact version. Earlier prototypes maybe big enough to pull those larger debris. Alternatively, since the technology clearly utilizes [[{{Hammerspace}} Hammerspace]], the large debris may have come from other people's experiment.
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[[folder: How would a successful teleportation demo have worked?]]
* In watching the teleportation demo disaster, I'm wondering how the logistics of a successful demo was supposed to have worked. First off, we're shown that simply tossing a hat into the portal had enough momentum to carry through to the other portal and emerge with its velocity intact. Yet when it came time for the pod it is flung into the portal at a pretty fair clip...20mph? 30mph? Why did the pod need to enter so fast? Then, what was the exit strategy? The pod was guided on a track straight to the entrance of the first portal. But the second portal, had....well nothing. No landing track, no netting, not even a stack of mattresses to facilitate re-entry. Was it just going to crash onto the ground below? If the pod was capable of some kind of thrustered flight, then the pilot would have needed to fire their braking thrusters immediately upon exiting the portal to prevent it from crashing into the control room which it was now heading toward. And if the pod was capable of flight it seems like the demo would have worked better to hover the pod at the first portal, gently enter and emerge from the second portal and land.
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** Three, Hiro has already been established as being incredibly smart for his age - he graduated high school when he was just 13 and has already applied for college, yet still acts like an excitable, hormone-addled teenager who, according to Baymax, is only now undergoing puberty. Odds are if a normal-age college student came in to report the theft and explained the situation in a believable, comprehensible manner, the officer would've taken it more seriously.
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[[folder: Walking off the pier]]
* Minor squabble, but when Baymax stops Hiro from walking off of the pier, he tells him, "Always wait one hour after eating before swimming." Given that this was the first thing he says after saving him, does that mean he would've let Hiro fall into the water if he hadn't eaten anything in the last hour? Isn't it a little weird for a healthcare robot to be programmed that way?
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* The part where Hiro hears the doorbell ring (signaling Baymax leaving) was probably just to avoid a sixty-second long shot of Hiro and nothing happening. As for why he was ahead of Hiro, we could see that Baymax didn't have to stop and stumble to avoid obstacles. Even at the part where Hiro comes close, he slides because he was running so fast. Baymax had a few seconds of a headstart.

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* The part where Hiro hears the doorbell ring (signaling Baymax leaving) was probably just to avoid a sixty-second long shot of Hiro and nothing happening. As for why he was ahead of Hiro, we could see that Baymax didn't have to stop and stumble to avoid obstacles. Even at the part where Hiro comes close, he slides because he was running so fast. Baymax had a few seconds of a headstart.



* As noted below, Baymax was a prototype. Tadashi almost certainly has all of the schematics and such backed up somewhere, along with the programming, so it wouldn't be too difficult for somebody else to continue his research and put Baymax into production as a medial assistant.

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* As noted below, Baymax was a prototype. Tadashi almost certainly has all of the schematics and such backed up somewhere, along with the programming, so it wouldn't be too difficult for somebody else to continue his research and put Baymax into production as a medial medical assistant.



* We know Tadashi is a robotics student, not a medical student. He did state that he programmed Baymax with over 10,000 medical procedures. Since it's much too unrealistic for him to be an expert in engineeering AND physiology, where would he get all the knowledge to be able to program them into Baymax? Did he collaborate with medical students from another school?

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* We know Tadashi is a robotics student, not a medical student. He did state that he programmed Baymax with over 10,000 medical procedures. Since it's much too unrealistic for him to be an expert in engineeering engineering AND physiology, where would he get all the knowledge to be able to program them into Baymax? Did he collaborate with medical students from another school?


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** The original Baymax is a tool useful for medical care - caring for the aged, easily transportable in an ambulance, on the battlefield, in time maybe even considered as much basic equipment as a fire-extinguisher. Why wouldn't Tadashi collaborate with medical students on him? In the meantime, Tadashi works on the robotics and the complex programming for Baymax to be able to update his own files and discern useful information from what's not useful.

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[[folder:How old are they?]]
* This has bugged me for a while. I know Hiro is 14 because it's mentioned, but I can't find any solid material on how old the other guys are. They've all clearly been working at SFIT for some time on their projects, and they're all older than Hiro, and they're all geniuses in their fields, but there's nothing in their design or dialogue that pins their ages down.

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[[folder:How [[folder: How old are they?]]
* This has bugged me for a while. I know Hiro is 14 because it's mentioned, but I can't find any solid material on how old the other guys are. They've all clearly been working at SFIT for some time on their projects, and they're all older than Hiro, and they're all geniuses in their fields, but there's nothing in their design or dialogue that pins their ages down.down, and I can't seem to find anything canon.
[[/folder]]

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