Nietzsche isn't denying that the world exists—he's suggesting that our immediate encounter with reality always arrives filtered through perspective, value, and the peculiar instruments of our minds. The radical part isn't that people disagree about facts, but that the very act of selecting what counts as a fact is itself an interpretation. Watch how two people describe the same day: one notices the morning rain ruined their plans, another celebrates the garden finally getting watered. Neither is lying, yet they've assembled entirely different truths from identical circumstances. What troubles and exhilarates us about this insight is that it frees us from pretending objectivity is possible, while burdening us with the responsibility of owning what our interpretations reveal about our values.