Instructions 20Q Game: These are similar to full games, but for quizzes larger than 20 questions it will randomly select 20 questions from within the set. This is a quick way to get in some studying of a topic.     
Identify the following philosopher:

(1905-1980) French philosopher and playwright. Key figure in existentialism and phenomenology, and a leading figure in 20th-century French philosophy and Marxism. Wrote "Being and Nothingness" (1943) and "Existentialism Is a Humanism" (1946).
Jean-Paul Sartre
Alexis de Tocqueville
Philo of Alexandria
Ayn Rand