... Searle's next move is to assert that a lack of awareness of such qualities as "the micro-structure" (i.e., H2o versus XYZ) does not entail that the contents of the head is insufficient to fix the conditions of satisfaction of speech acts. This is so because there are expressions whose extensions are determined by factors that are independent of whether certain people have any awareness of the extension of the expression. So for Twin Earth Jones, the expression "water is H2O" stands true even though for him, water is actually XYZ. This is so because "water is H2O" is simply a fact about the world in which Earth Jones lives. In other words, Searle does not think that there need be a conflict between water being simultaneously XYZ and H2O. More importantly, the two Jones' lack of awareness of the micro-structure of the two substances referred to by each other's expression, ...

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