Nietzsche and the Problem of Perspectivism
That dilemma appears often in Nietzsche's writings. It is a contradiction he did not appear interested in helping the reader to figure out. But he was pretty clear that "perspectivism" was not a
thesis as such. The nature of argument is based upon establishing conditions as either one thing or an other and that is the first challenge thrown down in Beyond Good and Evil. He criticizes the metaphysicians thusly:
Things of the highest value must have another, separate origin of their own, – they cannot be derived from this ephemeral, seductive, deceptive, lowly world, from this mad chaos of confusion and desire. Look instead to the lap of being, the everlasting, the hidden God, the ‘thing-in-itself’ – this is where their ground must be, and nowhere else!”
BGE, 2, translated by Judith Norman
This is not a take down of the "law of non-contradiction." The observation is that the either/or used to establish the necessity for a point of view can exclude experience in many ways. The practice of argument can also put a finger on the scale, as it were. Nietzsche delights in presenting philosophers in that light.
Another element to consider is how much of the "objective" truth is supposed to be a result. Consider the distinction made here:
But anyone who looks at people’s basic drives, to see how far they may have played their little game right here as inspiring geniuses (or daemons or sprites –), will find that they all practiced philosophy at some point, – and that every single one of them would be only too pleased to present itself as the ultimate purpose of existence and as rightful master of all the other drives. Because every drive craves mastery, and this leads it to try philosophizing. – Of course: with scholars, the truly scientific people, things might be different – “better” if you will –, with them, there might really be something like a drive for knowledge, some independent little clockwork mechanism that, once well wound, ticks bravely away without essentially involving the rest of the scholar’s drives. For this reason, the scholar’s real “interests” usually lie somewhere else entirely, with the family, or earning money, or in politics; in fact, it is almost a matter of indifference whether his little engine is put to work in this or that field of research, and every philosophy constitute the true living seed from which the whole plant has always grown. Actually, to explain how the strangest metaphysical claims of a philosopher really come about, it is always good (and wise) to begin by asking: what morality is it (is he –) getting at? Consequently, I do not believe that a “drive for knowledge” is the father of philosophy, but rather that another drive, here as elsewhere, used knowledge (and mis-knowledge!) merely as a tool. But anyone who looks at people’s basic drives, to see how far they may have played their little game right here as inspiring geniuses (or daemons or sprites –), will find that they all practiced philosophy at some point, – and that every single one of them would be only too pleased to present itself as the ultimate purpose of existence and as rightful master of all the other drives. Because every drive craves mastery, and this leads it to try philosophizing. – Of course: with scholars, the truly scientific people, things might be different – “better” if you will –, with them, there might really be something like a drive for knowledge, some independent little clockwork mechanism that, once well wound, ticks bravely away without essentially involving the rest of the scholar’s drives. For this reason, the scholar’s real “interests” usually lie somewhere else entirely, with the family, or earning money, or in politics; in fact, it is almost a matter of indifference whether his little engine is put to work in this or that field of research, and whether the “promising” young worker turns himself into a good philologist or fungus expert or chemist: – it doesn’t signify anything about him that he becomes one thing or the other. In contrast, there is absolutely nothing impersonal about the philosopher; and in particular his morals bear decided and decisive witness to who he is – which means, in what order of rank the innermost drives of his nature stand with respect to each other.
BGE, 6, translated by Judith Norman
So, you have a critic of "objectivity" making distinct claims about what exists. The easiest thing to do at this point is got off the highway and go somewhere else.