> The hard part is ... not building them when you already know what to build. Indeed. A somewhat sharp schoolchild could build a light bulb or an electric moto

> The hard part is ... not building them when you already know what to build. Indeed. A somewhat sharp schoolchild could build a light bulb or an electric motor/generator, and understand the basic underlying principles, in a pretty short time. But how many decades did it take the first researchers and inventors of those things to get to that same point? Heck, there was a high school kid who built a primitive semiconductor fab in their garage.[0] But for novel advancements, even getting to the point where you have an idea of what isn't impossible is half the battle. [0] https://news.ycombinator.com/item?id=28176255 https://news.ycombinator.com/item?id=28176255