1 - we think that a highly advanced alien civilisation would build massive startships that move at increadible speeds, Radio beacons that signal to alien civilisations, dyson spheres, etc. These things would be massive, easy to detect, and stick out like a sore thumb.
2 - with our instruments, we can observe vast swathes of space, many galaxies, quite precisely. So it appears that no highly advanced alien civilisation is in our galaxy or the nearby galaxies
3 - Even at our technology level, If we wanted to signal out into the void on purpose, we could signal quite far - thousands of lightyears, and if we wanted to target a particular star we could signal precisely with a large laser and that signal would be detectable across most of the galaxy.
So it stands to reason that there is no civilisation similar to ours in the near couple hundred lightyears and that there is no advanced civilisation, the way we envision them, in our or nearby galaxies. It could be that everyone is hiding, or our idea of advanced civilisation is wrong. Or anytthing else really. That;s hwy it's a paradox/
2 - with our instruments, we can observe vast swathes of space, many galaxies, quite precisely. So it appears that no highly advanced alien civilisation is in our galaxy or the nearby galaxies
3 - Even at our technology level, If we wanted to signal out into the void on purpose, we could signal quite far - thousands of lightyears, and if we wanted to target a particular star we could signal precisely with a large laser and that signal would be detectable across most of the galaxy.
So it stands to reason that there is no civilisation similar to ours in the near couple hundred lightyears and that there is no advanced civilisation, the way we envision them, in our or nearby galaxies. It could be that everyone is hiding, or our idea of advanced civilisation is wrong. Or anytthing else really. That;s hwy it's a paradox/