Despite this, someone may argue that the existence of all we perceive depends on something else, which in turn depends on another thing, ad infinitum. This is false. For instance: could this universe be explained by another universe, which in turn is explained by another universe, with the series of explanations continuing forever? This would not solve the problem of requiring an explanation. Even if there were an infinite number of universes all dependent on each other, we could still ask: Why does this infinite chain of universes exist?