Well, it’d be a pretty crappy energy source otherwise.
But, you do put all the energy in, if you look at it properly. You know matter and energy are equivalent (in some ways)? E=MC^2 and all that, right? If you put in matter, you’re basically putting in energy, if the fusion reactor can fuse that sort of matter. (Harder the heavier the atoms get.)
Think of it like a gasoline engine… The only ‘power’ you put into it is from the starter motor and to the spark plugs. But it uses the power in the gasoline, by breaking certain chemical bonds.
The fusion reactor is similar, except it works with atomic bonds, or rather, subatomic, instead of chemical.
On the subject of plot holes…
There’s the energy one, if you get X energy from the people batteries, you require nX, where n is greater than one, by some margin, representing the inefficiency of the human body as a heat generating engine.
This can be explained by saying that the humans were wrong, and didn’t know the whole story, but it seems unlikely. If we assume that the humans are right about the events that happened, they’d know when the machines started farming humans. If the machines did this in response to the blocking of the sunlight, and not before, then it’s unlikely they were doing it for the extra processing power.
So, it’s fairly likely that the humans would be correct in their understanding of the AI’s purpose. Especially considering their successes in hacking into the matrix and other efforts that require knowledge of the goings on in the AI/machine system.
There are many ways the machines could get more power… simply burning the food they fed the humans would probably work. Or they could use geothermal power. Or, use space-based systems that beam very concentrated microwave power down, high enough power to make it through the nuclear winter dust clouds. Or, with fusion reactors, or regular fission reactors.
Then there’s the whole VR problem that has never been addressed properly, imho.
Why would you plug something directly into your head if you could die by doing it? Hasn’t anyone heard of fuses, or proxy servers? Instead of actually sending your intellect into the matrix, which seems to suggest that your brain waves are actually moved from your brain into the network, why not have a proxy system in between. Your proxy pretends to be you, and enters the system. You then see a relayed reality from the proxy. If the proxy gets ‘trapped’ in the VR, you simply disconnect safely from the proxy. The proxy would transmit everything, except killing damage, etc. I’ve never heard an even semi-technical answer as to why if there’s a system between you and the net, and the whole process isn’t a magical human-brain thing, you can’t have another machine in there, to protect you from possible overloads. (An example, there are weaknesses, bugs perhaps, in the human brain - the flashing lights triggering epilepsy is an example - a proxy server would watch for this known danger and simply filter it out before sending the information on to you.)
Then, there’s the problem with people being able to influence the matrix. If the computer generates it, why doesn’t it have absolute control? For example, when I play Quake3 online, my character can’t levitate, no matter how hard I will them to.
And, on the same idea, why can’t the computer do anything it wants in its own reality? Why can’t the agents simply snuff out any simulated person? They use miraculous powers to get there, taking over people, yet they then resort to fighting human style, with guns and martial arts, even if they are very good at it. Considering the computer theoretically controls the VR, the agents should be completely omnipotent. If you swing at them, reality is rewritten and they aren’t there. If they ‘shoot’ you, the bullet hits, no travel time, etc.
Then, there’s the idea of people having to be in a certain simulated reality. It’s a neat idea that too much luxury doesn’t work, but that doesn’t explain they had to use the simulation they did, excepting for a moment, the requirement for keeping as many people as possible alive. The vast majority of people in the world will never meet. They could have run a bunch of seperate simulations, either of various parts of the world, or all of the same place, that contained only a small number of people, with the rest of the supporting personalities being AI. This way if there was a problem, they could just shut down the matrix and kill a thousand of so people. Then, going even one better, if they could simulate any time, why not a hunter-gatherer world, where people lived in 50-person tribes. Then simply run millions of these seperate sims. This has the benefit that even if someone does gain the abilities of the chosen, or figure out a way out of the matrix, they’ll have a pre-technical education and be unable to cope with the reality, or help the resistance in a meaningful way. Neo was instantly able to fit into the ship’s crew because he was trained in using computers, the only difference was a newer interface. The concepts were all the same. He was familiar with the idea of a virtual reality, from the same fiction that we’re familiar with. If he had been raised as an ignorant hunter, he’d have been useless to them. Especially if the computer invented a new language for each tribe, so even if they were contacted from outside, they’d be unable to communicate. Very bad systems design.
A fun movie to watch, but with very many plot holes, even if you assume that the characters don’t know exactly what’s going on.
It asked some interesting questions, but nothing I haven’t seen in print for many years in various sci-fi novels, or in older movies. Not that this invalidates the movie, but a lot of people cut it slack because it’s cutting edge, and original, which it isn’t. The only thing new about The Matrix is that the special effects are a lot better.