LG-012

Logic check: All chefs are early risers. Some early risers are travelers. Which statement must be true?

Given: All chefs are early risers. Some early risers are travelers.

Key idea: “Some early risers are travelers” means there exists at least one person who is both early risers and travelers — so it is automatically true that some travelers are early risers.

Nothing guarantees that any chefs are travelers, so option 1 is not required.

• Picking the first pattern you see without checking it against all rows/columns.
• Ignoring the simplest rule (counts, rotations, alternations) and jumping to a complex story.
• Not testing your rule on the middle row/column (where many puzzles “break” bad rules).