There are lots of different types of evidence that tunnels exist what are you talking about? We've had tunneling technology for drilling deep underground tunnels for decades
Lots of evidence that you conveniently can assert but not name. It doesn't matter whether we have the "technology," Tunnels can be dug with pick and shovel, as many ancient civilizations have shown. Your problem is to substantiate the allegation that "tunnels" exist. Just because you have pencil and paper doesn't mean you have written the Great American Novel.
There are lots of different types of evidence that tunnels exist what are you talking about? We've had tunneling technology for drilling deep underground tunnels for decades
Lots of evidence that you conveniently can assert but not name. It doesn't matter whether we have the "technology," Tunnels can be dug with pick and shovel, as many ancient civilizations have shown. Your problem is to substantiate the allegation that "tunnels" exist. Just because you have pencil and paper doesn't mean you have written the Great American Novel.