I'd say they matter to the degree that they have associated meanings governing their choice. At some point, due to the manner in which individual words are used to reflect our thoughts and experiences, particular phrases become codified with the type of meaning one can find in a dictionary. The phrase, "I love you," is one of these. For purposes of this discussion, it may be considered as a word-group or, more properly, a meme.
As words are commonly grouped into recognizable memes, they follow the same pattern I described above. Their human meaning must be interpreted contextually. To do otherwise is to reduce the human mind to a dictionary. And that it simply is not.
To use your example:
The phrase "I love you" is meaningless without context. It is the specific context in which it is used that gives it meaning.
__________________
create evolution
|