Also some cultures put the pressure of communication on the listener. Say, you're in the same town as a friend and want to meet them. The American approach mig

Also some cultures put the pressure of communication on the listener. Say, you're in the same town as a friend and want to meet them. The American approach might be to ask, "Hey, I'm in town. Want to hang out?" The sender has done their job of delivering a clear message. But some cultures would just say, "Hey, I'm in town." That removes the pressure from the other person to say no, I don't want to see you. You can also bat it back and say, "Joe's is a nice place to eat if you like burgers," which hints that you're available to have lunch together, but it could also mean a polite "ok". But the ack is there to make sure the other person is paying attention before delivering the message, so they don't misinterpret it. I don't necessarily think one is better. TCP vs UDP. If it's an important message, an American might still say, "We have to talk."