Re:More than one conclusion. (Score 1)

I think it's all about abstraction. Our language is highly abstract, so we can express complex thoughts by putting different words together and use a syntax. Such a sentence cannot be devided without losing it's meaning. Most life forms DO communicate, even bacteria do. But usually one sound/gesture/smell/etc has one meaning. Of course, the transition is smooth, as is evolution. So there won't be any exact definition.