 Though it has substantial plausibility in connection with various derived epistemic sources such as scientific instruments, it is clear that [P1] runs afoul of the local skepticism constraint. It amounts to a demand which is in principle unsatisfiable. If, as [P1] implies, intuition must be calibrated by some other source, X, then, by [P1], X must itself be calibrated by yet another source of evidence, Y, which must itself be calibrated and so on. Some hold, in virtue of this fact, that it is impossible to arrive at justified belief and others that it is, in suitable circumstances, possible to do so. If the former is true, then [P1] runs afoul of the local skepticism constraint. If, instead, the latter is true, then [P1] is false. Additionally, it seems clear that an argument for [P1] will require evidential reliance on epistemic intuitions and so contravene the non-self-undermining requirement.