In the history of western philosophy, we find two traditional views of “serious metaphysics”: Aristotle’s and Kant’s. Albeit not as clear as we might prefer, from Aristotle we learn that metaphysics is the study of “being qua being”. We take this to mean a study of reality as it is, in itself, independent of how we conceptualize it. From Kant, we learn that this is not quite possible, that our conceptual apparatus is employed in all thought, even thought about “being qua being”. For him, knowledge of metaphysics is encompassed by necessary knowledge that is synthetic ap riori, derived by transcendental argument moving from our experiences to their necessary prerequisites. While neither put it perhaps in exactly these words, both Aristotle and Kant took their subject matter to be the actual world as it is, and not merely the study of a world as it could possibly be but actually is not. On one hand, considering how things possibly are is useful to metaphysics insofar as this shines light on how things actually are. On the other hand, however, from considering possibility for its own sake, or possibility not predicated upon that which is actual, we gain no insight into the actual world and we are not doing a good job with our metaphysics. Undoubtedly, our technical understanding of modality has become more nuanced than it was for these old world philosophers. Nevertheless, they have determined the parameters of the subject matter for serious metaphysicians. As in introduction to what is meant here by “serious metaphysics”, Kant’s second analogy can serve as a paradigm: we find it a metaphysically necessary, synthetic ap rioritruth that causes temporally precede their effects. This is not a causal truth, but rather a condition on the application of the concept of causation. Neither is this a truth of logic or a conceptual truth because one cannot derive a contradiction from the claim that it is false. (This is saying nothing more than that it is a synthetic and not an analytic truth. 2 ) There is no logical contradiction in considering a world where effects precede their causes, as there is in considering a world with
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