It isn't that we all know how to build this stuff - but more that we know the stuff exists. We all have these ideas. It is online, it is written in books. The c

It isn't that we all know how to build this stuff - but more that we know the stuff exists. We all have these ideas. It is online, it is written in books. The chances of all of our information being lost is slim. We have a pretty good literacy rate now as well. You don't need to know everything: Other folks know a lot about mining, making wire, and so on. Some folks know a great deal about making medicine, fixing bones, and so on. This is why I say it won't be lost: We have the information, both digital and in hard copy form. We know it all exists: We'd rebuild. It isn't going to need YOU, specifically, to remember it all, but simply to know this stuff exists and understand that folks are peppered through the earth that know about the technologies you don't - and know what these things are used for. We wouldn't lose toilets - a well documented technology - we'd rebuild them. A solar flare wiping out some of the communication routes wouldn't be enough. That would simply be a setback - a major one, but not enough to destroy things. This is all despite folks not believing in a round earth or vaccines and all of that stuff.