I will discuss these objections later. Meanwhile, another puzzle. If Leibniz II is correct, we can substitute any two proper names so long as they are names for the same person, salva veritate. Thus, if Shakespeare and Edward de Vere (another contender for the identity) were the same person, it follows that
- We have always known that Shakespeare was De Vere, since we have always known that Shakespeare was Shakespeare, a logical truth.
- We could never discover that Shakespeare was De Vere, since you cannot discover what you already know.
And so on.