"Our galaxy is about 100,000 lightyears across. Aliens living on the other side of the galaxy looking for intelligent life wouldn’t have received our 21st century radio signals yet and would think we were still living in caves. Are we missing some nearby intelligent neighbors for the same reason?"
If by "telepathic" you mean 'sociopathic' then yes...they're most certainly telepathic.
it's a contraction of telephone an apathic.