Much of Peacocke's project consists in articulating and defending the Principles of Possibility.
In pursuing moderate rationalism for modality Peacocke develops the Principles of Possibility account.
(For critical discussion of the Principles of Possibility approach see the symposium on Being Known in Philosophy and Phenomenological Research 64(3).) In general, there are two main critical issues that surround the Principles of Possibility.
In this section I review David Chalmers's Modal Rationalism, Christopher Peacocke's Principles of Possibility, E.J. Lowe's Serious Essentialism, and Bob Hale's Essentialism.
\(X\) understands, evaluates, and is capable of making modal claims, such as (iii) and (iv), because \(X\) has tacit knowledge of Principles of Possibility in virtue of which modal claims, such as (iii) and (iv), are understood, evaluated, and hold true.
The other incompatibilist position is to affirm libertarian free will along with the principle of alternate possibilities (premise 9), and to deny the possibility of infallible foreknowledge.
Note that Skeeter bears obvious resemblances to Harry Frankfurt's famous counterexample to the Principle of Alternative Possibilities.
And so we have, in this case at least, no counterexample to the Principle of Alternate Possibilities.
Frankfurt's argument was directed against the Principle of Alternative Possibilities (PAP PAPApersonerson is morally responsible for what she does do only if she can do otherwise.
Another contribution was Harry Frankfurt's argument against the Principle of Alternative Possibilities (PAP), a principle stating that an agent is morally responsible for what she does only if she can do otherwise (Frankfurt, 1969).
