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Knight in Shining Armour is a cooked quant interview question on puzzles.
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This is an easy logic puzzle that appears in interview settings to assess how quickly a candidate can reason through constraint-satisfaction problems. It combines formal logical deduction with case analysis—skills that matter in roles requiring clear reasoning under pressure, from quantitative trading to software engineering.
The standard approach is to enumerate all possible states (in this case, four combinations of types), apply each statement as a constraint, and identify which state or states remain consistent. Success depends on careful bookkeeping and avoiding hasty conclusions; interviewers watch for whether you check your work and acknowledge ambiguity if it exists.
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