| Philosopher Zeno's home |
| Philosopher who coined "categorical imperative |
| Actress Katherine who posited the weltgeist... wait, no, German philosopher who was on "Grey's Anatomy |
| 18th-c. German philosopher Immanuel |
| An Enquiry Concerning the Principles of Morals" philosopher |
| Austrian physicist and philosopher |
| Philosopher's study |
| Absolute idealism philosopher |
| Philosopher proscribed by the Vatican |
| Age of Reason philosopher |
| Philosopher who wrote "Superstition is the religion of feeble minds |
| 20th century French philosopher and novelist |
| Philosopher who wrote "anxiety is the dizziness of freedom |
| Categorical imperative philosopher |
| Ancient Chinese philosopher |
| Common sense" philosopher Thomas |
| Ancient Greek philosopher |
| An Enquiry Concerning Human Understanding" philosopher |
| Age of Enlightenment philosopher |
| Fifth-century B.C. philosopher |
| Author/philosopher/lightning rod Rand |
| Shellfish philosopher? |
| To whom Mortimer declares "They were the footprints of a gigantic hound! |
| Philosopher Zeno's town |
| Philosopher's wickedness? |
| A Treatise on Human Nature" philosopher |
| Mathematician/philosopher Descartes |
| Chinese philosopher whose writings are the basis of a religion |
| A propensity to hope and joy is real riches" philosopher |
| Eminent 12th-century philosopher |