Related Clues:

• Sudoku solver's need
• Moralist's concerns
• Need for KenKen
• Spock trademark
• Deductive reasoning
• Mr. Spock's strong suit
• Sudoku skill
• Boolean ___
• Sound thinking
• Morality
• Wrong-and-right field
• Aristotle forte
• Set of business principles
• Science of moral principles
• Principles of right and wrong