9. Nobody is taller than the Empire State Building. (Px: x is a person; Txy: x is taller than y; e: Empire State Building) 10. Nothing is heavier than itself. (Hxy: x is heavier than y) 11. Cats are smarter than dogs. (Cx: x is a cat; Dx: x is a dog; Sxy: x is smarter than y) 12. Mark Twain wrote Huckleberry Finn. (Wxy: x wrote y; t: Mark Twain; h: Huckleberry Finn) 13. Val Kilmer is married. (k: Val Kilmer; Mxy: x is married to y) 14. All of Nathan's sailboats are faster than Ron's. (Sx: x is a sailboat; Bxy: x belongs to y; Fxy: x is faster than y; n: Nathan; r: Ron)