In the case we have discussed, the symbol in question has a conventional meaning: it is raining, and when the speaker makes an utterance with this symbol he expresses a speaker meaning, a speech act meaning: it is raining.
A related second question is: How do we explain the pervasiveness of noun phrases and verb phrases in human languages, and how doe we explain that typically sentences contain both noun phrases and verb phrases?
Now we turn to the second question.
For example, making such and such an utterance X in this context C counts as making a promise, Y) The question is, How do we get the rules?
But, to repeat the question, how do we evolve the deontic power out of the act of meaning something by an utterance?
Because the phenomena in question only are what they are in virtue of being represented as what they are.
The issue of what is special to language The most fundamental question in the study of the human language faculty is its place in the natural world: what kind of biological system it is, and how it relates to other systems in our own species and others.
This question embraces a number of more specific ones (Osherson
A second question is what parts of a person’s language ability (learned or built-in) are specific to language and what parts belong to more general abilities.
The answers to this question will often not be dichotomous.