What if that evidence is already here but not being shared? That general has already said that they have back engineered alien aircraft
Thats a huge what if. Especially if the actual science we know is considered.
The distances are mind numbingly massive in space. We know with reasonable certainty that light speed travel is pretty much impossible. Even if intelligent lifeforms have the ability to travel at significantly faster speeds than we can those distances still remain so incredibly huge. Add in the issue of signal attenuation that intelligent life form signals will experience as they travel through just our own galaxy and hearing alien transmissions also becomes a major problem. Our own radio and tv signals that we have been putting out into space for 100 years have still only travelled in galactic terms a tiny tiny distance.
A general has said they have already back engineered and alien craft.
Thats what you are pinning your hopes on? I would love it to be true and am absolutely sure there are many many places in space where intelligent life exists, more advanced than our own
You need to weigh up the hard science involved versus the possibility that a human might be acting in the manner with humans sometimes do, the conscious or unconscious desire for attention. He might well be telling the truth but the possibility he is either deranged or seeking attention for me is easily swamped by the science involved.
Its not just the distances that are problematic. Its the size of the time scales. There are tons of great videos or articles on line which explain the massive distances and also the massive timescales and the significant difficulties in time lines involved.
I am absolutely sure intelligent life exists elsewhere, I am a long long way from convinced that we have ever been visited or will be in the near future.