 Furthermore, the apriorist account, like the epistemic argument that led us to it, relies on the assumption that meanings, and their a priori consequences, are known to speakers, who then lean on this knowledge in forming intuitive judgments about what could turn out to be true of Socrates—or bachelors. But consider the person who finds it intuitive that a planet might not have achieved hydrostatic equilibrium? We would like to say that they don’t fully understand what “planet” means, given that this is one of the conditions in the 2006 definition arrived at by the International Astronomical Union (see Other Internet Resources). However, on the apriorist account, we are forced to say instead that the proposition that all planets have achieved hydrostatic equilibrium does not follow from the meaning of “planet”, as it does not belong to the a priori core (as proven by the one speaker who doesn’t find it intuitive). Indeed, the a priori core, whatever it is, only supports the judgment that all planets have achieved hydrostatic equilibrium in conjunction with the a posteriori knowledge that achieving hydrostatic equilibrium was a clause in the definition of “planet” stipulated by an authority.