A number of philosophers have argued that "water" for both Oscar and Twin Oscar refers to anything that is sufficiently water-like (i.e. the term's extension includes both H2O and XYZ). They reject, therefore, the contention that "water" is a rigid designator referring to H2O. John Searle, for example, argues ("Intentionality: An Essay in the Philosophy of Mind") that, once we discover that our water is H2O, we have the choice of either redefining it as H2O (a classical reduction redefinition) or continuing to allow the term water to refer to anything with the basic properties of water (transparency, wetness, etc.). Searle suggests that in the Twin-Earth example, the second seems more plausible, since if Twin Earth doesn't have water, then all its water-based products will also be different. Twin ice cream, for example, will be constitutionally different, yet we will still be tempted to call it ice cream. Searle, along with others, considers this sufficient argument to "solve" the thought experiment altogether; others, such as Donald Davidson, feel that variations on the experiment can be used to draw some of the same conclusions.