Aenesidemus is a German book published anonymously by Professor
Gottlob Ernst Schulze of
Helmstedt in 1792. Schulze attempted to refute the principles that
Karl Leonhard Reinhold established in support of
Immanuel Kant's
Critique of Pure Reason (1781). The title is a reference to
Aenesidemus, an ancient Greek
skeptical philosopher. Its complete title, in English translation, was
Aenesidemus or Concerning the Foundations of the Philosophy of the Elements Issued by Professor Reinhold in Jena Together with a Defense of Skepticism against the Pretensions of the Critique of Reason.