Most rationalists reject skepticism for the areas of knowledge they claim are knowable "a priori". Furthermore, some rationalists also claim metaphysics is knowable in this thesis. Most rationalists agree mathematics is knowable by applying the intuition and deduction. However, not all idealists restrict the real or the knowable to our immediate subjective experience. Therefore, the knowable alone is the ignorable. Since God is experienced as good, one can be confident that reality is knowable. He criticizes the Academic skeptic's claim that nothing is knowable as being an affirmative belief. Complicated implies being difficult to understand but with time and effort, ultimately knowable. The only knowable reality is the represented image of an external object. Therefore, matter, should it actually exist, is, at the very least, not knowable. Another criticism is that terms such as "known, knowable, sense," and "categorize" are ambiguous. Hunter is never likeable, or even knowable. A "judgment" is something that is knowable, that is, an object of knowledge. Scholars largely agree that Farabi's ethnic background is not knowable. Our ways of being affected are alone knowable.