system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Can we create our own internet ?

Can we create a connection to the internet ourselves without having to use a cellular 3g/4g subscription / wifi subscription?
gpt
The internet isn't a resource like wood or water that can be "produced". It's a connection to the rest of the computers/servers/sites on the network.

It's a bit like, "can we create our own, separate road network?" Yes, you certainly can, but you'd need to build your own connections to each place that you go to. You'd need to ask your supermarket if they would let you build a separate road connection to their property, with a separate parking lot, just for your users. Same for the drug store, Amazon warehouse, and any other company/location you'd be interacting with. You'd need to get approval from the town/city/national governments to build your road system in parallel with (but not interacting with) their roads.

It's not impossible to do it. But that's about the best argument that can be made: it's not physically impossible.