Moses agrees to buy a car from Sally, thinking that it is only 2 years old with less than 10,000 km driven in it.In fact the car is 5 years old car and has been driven over 120,000 km. As the purchase price is to be paid over 3 years, Sally requires that Moses have George provide a guarantee. Some months later, Moses learns the truth about the car and stops making his monthly payments to Sally. Sally makes demand against George as guarantor. What should George's response be?