[darawk]

Maybe you should read them. Neither remotely supports the point you're trying to make.

Unless all you're trying to say is "people have been digging tunnels for a while". Which is about as useful as pointing out that people had been riding horses for a while so transportation was probably as efficient as it was going to get.

[wcarron]

lol ok buddy. Have a good christmas. Maybe someone'll buy you a coursera on reading comprehension!

[darawk]

You have a good way to signal that i'm wrong, and a bad way. The good way is to quote the paragraph you think supports your point. You're choosing the bad way, which is pretty solid evidence that you're the fool pretending to knowledge, and you know it.