 (P3) is also difficult to resist, since its denial would seem to require positing the existence of a thinking being in your chair other than yourself. For if (P1) and (P2) are true, and if it is true that you exist and are thinking, then denying (P3) results in the implication that you are but one of (at least) two thinkers seated in your chair. Such a view faces a host of difficult questions: practical questions (e.g., which of these beings owns the car parked out front?), epistemic questions (how do you determine which of these beings you are?), linguistic questions (to which of these beings do instances of the first-person pronoun refer?), ontological questions (what is the relationship between you and the qualitatively identical being with which you are associated?), and so on. These challenges have not passed unnoticed, and serious attempts have been made to address them. But, the animalist says, the trouble can be avoided from the start simply by conceding the truth of (P3).