There is a difference between the sense of a term and its reference (i.e. the object itself).[6] Thus, we can understand a claim like "goodness is identical with pleasure" as an a posteriori identity claim similar to "Water is H2O". The question "This is H2O but is it water?" is intelligible and so, in that limited sense, whether or not water is H2O is an open question; note that this does not address the issue of significance. But that does not lead us to conclude that water is not H2O.