Final answer:
Declan's claim that 4 multiplied by any number n is greater than 4 is disproven for the case where n equals 0, since the product in this case is 0, not greater than 4.
Step-by-step explanation:
Declan's statement is that the product of 4 and any number n is supposed to be greater than 4. To find a counterexample that proves Declan wrong, we should consider values of n that are less than 1, because multiplying 4 by any number less than 1 will give a product less than 4. A clear counterexample is when n is 0, since 4 x 0 equals 0, which is not greater than 4. Thus, Declan's statement is incorrect for the value of n equal to 0.