How does Kant’s theory explain synthetic a priori knowledge?

Immanuel Kant’s theory of synthetic a priori knowledge addresses how we can possess information that is both informative (synthetic) and necessarily true independent of experience (a priori).12

In his Critique of Pure Reason, Kant argued that such knowledge is possible because the human mind is not a passive recipient of data but an active participant in structuring experience. He proposed that space, time, and the categories (such as causality) are not derived from the world but are a priori forms imposed by the mind onto the "stuff" of experience.2314

Because these mental structures are necessary conditions for having any experience at all, they prescribe the general form that all objects of experience must take. Consequently, synthetic a priori judgments—like "every event has a cause"—are possible because they express these fundamental conditions imposed by the mind. Kant compared this to a Copernican revolution: rather than the mind conforming to objects, objects must conform to the requirements of human sensibility and rationality to be known.24