When I say or write something, there are actually a whole lot of different things I am communicating. The propositional content (i.e., the verbal information I'm trying to convey) is only one part of it. Another part is stuff about me, the communicator. Everyone knows this. It's a function of the fact there are so many different well-formed ways to say the same basic thing, from e.g. 'I was attacked by a bear!' to 'Goddamn bear tried to kill me!' to 'That ursine juggernaut did essay to sup upon my person!' and so on.