Possible Clues:

• William becoming possessive when it comes to his razor?
• One scientific principle is -'s razor
• Chairman penning small volume rejected philosopher
• Eccentric commander? Quite the reverse, his razor cut the cackle!
• __'s razor: logical principle
• Philosopher specializing in close shaves?
• Logician who espoused simplicity
• Philosopher who favored simpler explanations
• —'s Razor advises not to complicate analysis
• "The simplest explanation is best" principle, ___'s razor