I want to thanks Jeff Herman for his discussion on ET's existence in the supernatural forum for sparking this.
If alien life forms do exist, how would we communicate with them if they are light years from us? How would we communicate if they came to earth? Is mathematics truly a universal system of communication?
The larger question is, why would we communicate with each other? I don't think I'd have anything to say. I'd be polite by asking nothing. I'd show them my kitchen in case they're hungry or thirsty, and perhaps show them some articles on the computer about how toxic human bodies are, in case they get any unfortunate ideas.
Why? Human curiosity. If no other reason but the constant quest we have as a species to know.
Maybe I'm underestimating myself, but I think the first thing I'd want to know is where to run.
If ETs were even close to humanoid then I am sure we would find a way. Maths will certainly be universal across the Universe
Here's a wild theory: They simply don't communicate with others, for the simple reason that they are suspended in a nano second of Earth time but an infinity in their time. They are programmed to do everything that they do, and communication outside their reality has no purpose. Can we communicate with ants? Interference doesn't count as communication.