Immanual Kant

“His most famous formulation of this law insists that you should act only according to that maxim whereby you can, at the same time, will that it should become a universal law. If everyone lied when convenient, the very concept of a "promise" would vanish; therefore, lying is inherently irrational and immoral.”

“He treats the categories as a "brute fact" of human nature. He famously refuses to provide a "natural history" of the mind, which he would dismiss as "physiology" rather than philosophy.”

“By setting the boundaries of human reason, Kant essentially defined the "territory" of scientific inquiry while leaving a mysterious, unreachable realm beyond it.”

“Reality as it exists independently of our perception.”

“Kant proposed that the human mind possesses innate "categories"”

“Critique of Pure Reason”