It’s an interesting claim but not really factual or able to be proven/disproven unless we were to complete the project ourselves :). My own opinion is we could

It’s an interesting claim but not really factual or able to be proven/disproven unless we were to complete the project ourselves :). My own opinion is we could (in this situation let’s just pretend to bureaucracy) build the entirety of the NYC subway. My main reasoning is a) we have repeatedly demonstrated the ability to build underground [1] and b) we have repeatedly demonstrated the ability to build trains [2]. Now a subway is probably harder because you need to combine the two things and there are probably complications to figure out how to build under a city, but I don’t know any further knowledge on the topic. [1] https://en.m.wikipedia.org/wiki/Tunnel_and_Reservoir_Plan https://en.m.wikipedia.org/wiki/Tunnel_and_Reservoir_Plan [2] https://en.m.wikipedia.org/wiki/California_High-Speed_Rail https://en.m.wikipedia.org/wiki/California_High-Speed_Rail