 The title, On Conjectures, is also intriguing because here Cusanus makes explicit the limits of human knowing only hinted at in On Learned Ignorance and in his later The Layman: On Mind. As his Prologue puts it, “You have seen that the exactness of truth cannot be attained. The consequence is that every positive human assertion of the truth is a conjecture…. And so the unattainable Oneness of truth is known in conjectural otherness and the conjecture of otherness is itself known in the most simple Oneness of truth.” Here the Neoplatonic dialectical principle that insists we never think anything apart from the First is applied even to human knowing. And such knowing is conjecturing.