We don't know much about ourselves. It's probably that we have such short lives so that even 100 years is considered extremely aged that we each have to start from scratch and disregard the advice of our elders. One thing seems certain--we can know only what we ourselves create.
One thing seems certain--we can know only what we ourselves create.
= = =
I suppose it depends on the definition of "know."
Evidently reverse engineering crashed craft taught us a lot. But that we still needed their assistance to build a fully functioning fleet.