Decide whether the statement is true or false. If false, provide a counterexample.
If a number is an integer, then it is rational.
A rational number is a number that can be written as the ratio of two integers. If the denominator of such integer is 1, then the rational number is equal to the integer in the numerator of the rational number, so an integer can be transfered into a rational number by being written as the ratio of itself and one which shows that an integer is a rational number and thus the statement is true.