>>11263520So let's see what you'd need: Base materials, some way to assemble cells, some way to organize cells in a coherent tissue, some way to organize tissues in a coherent system, some way to start such system at a point where it should have been started at a prior stage (think of it as trying to put eggs in a cake after you've baked it). The first one might be done by some nanomachine factory, maybe using bacteria and viruses. You'd need many, many specialized factories, but it's a matter of simply getting enough untill you can do it all. At this point, you've got the DNA of the being you'll create, of course. The DNA might not exist physically at first, but I'll asume it does for simplicity sake. Then, for the assembly part, you might do it similar to 3d printing for example, taking care that each cell is united to the next one in the manner it should. At this stage, you might want to start to add liquids with the proteins, minerals and other substances that need to be present in order for the body to function, since adding them later might be much harder. Some things might also need to be glued to the cells walls, so you'd need to glue that during their creation or when putting the thing together. If you did the tissues first and then decided to unite it, you'll have to deal with the fact that they're usually done together, so your assembly will either be really hard and precise or really bad. About starting the human, it might be as simple as spiking some nerves or a much harder procedure. I'll avoid comenting on this since I don't think I can even speculate how, but it might involve some weird reheating technicques.
Some details I left out: Gut bacteria can be introduced later. You might not want to create a completely natural human - some sort of cyborg might represent very little loss of function, or maybe a gain, and can make the process much easier by skipping biological components that are really hard to replicate.
(cont)
