This relationship between human and Cosmos, is what Meillassoux refers as "correlationism". Humans can only establish a correlation with the world through representational structures, but never can they access the in itself. But if one can only experience the world from their own perspective and understand it through synthetic categories via languages, then what is reality "as such"? This is part of what a speculative realist attempts to answer. It is also here, as what pertains to this "real", where Meillassoux intervenes the discourses of Descartes, Hume, Kant, and 20th century philosophers like Martin Heidegger, Jacques Derrida, and Emmanuel Levinas.