Possible Clues:

• Master/slave dialectic philosopher
• Say, what about Liberal philosopher!
• He purportedly said 'Only one man ever understood me, and he didn't understand me'
• German philosopher of dialectic
• Georg Wilhelm ---, Ger. philosopher
• Philosopher was a cad, tho' good at heart
• 'The Philosophy of Right' author
• Philosopher from the Gelsenkirchen area
• List to include Greek philosopher
• "Science of Logic" author