Influential German philosopher (1770–1831) who espoused a dialectical method by which an idea (thesis) was challenged by its opposite (antithesis) and the two ultimately reconciled into a third idea (synthesis). Scarce partially printed DS in German, signed “Hegel,” one page, 8.5 x 14, February 25, 1830. A Certificate for Theological Studies, from Berlin University, issued to Gunther Adolph Theodor Schroeder, signed in the lower left corner, “Hegel.” In fine, clean condition, with binding pinholes at left edge. Auction LOA John Reznikoff/PSA/DNA and R&R COA.