As Brian Chesky says, "If you can imagine it, you can create it".
What a silly thing to say. A quick glance at pretty much any sci-fi novel proves that. Go on, go build me a light-sabre, capable of cutting through metre-thick bulkheads. Once you've finished with that, I'd like a time machine so I can go back in time and look at dinosaurs, and also a perpetual motion machine. I leave the order of the last two up to you.
What a silly thing to say. A quick glance at pretty much any sci-fi novel proves that. Go on, go build me a light-sabre, capable of cutting through metre-thick bulkheads. Once you've finished with that, I'd like a time machine so I can go back in time and look at dinosaurs, and also a perpetual motion machine. I leave the order of the last two up to you.