Possible Clues:

• Philosopher from Communist bloc (Cambridge graduate)
• Certain razor's inventor
• --'s razor, the principle that entities are not to be multiplied beyond necessity
• William of ___ (man known for his razor)
• Razor manufacturer?
• Razor man?
• William of -- ('razor' philosopher)
• Philosopher who espoused simple explanations
• William of —, English philosopher
• Name on a philosophical razor