Something extraordinary. Say, intelligent signals arriving often and unquestionably from outside the Solar system that anyone can listen to directly, now, at wi

Something extraordinary. Say, intelligent signals arriving often and unquestionably from outside the Solar system that anyone can listen to directly, now, at will, -could- qualify as evidence. What any human has to say about it has no evidentiary value at all. Speculation, reports of personal experience, interpretations of strange infrared events in the sky, interdimensional transmogrification - no value. The intelligence found in the processes in mammalian genomes, how complex they are - to understand, let alone invent - tells me that we ourselves are just beginning to understand what 'intelligent' is. Until we are, we might not see it right in front of us.