Read the following passage and answer if the question is true or false.
Passage: Square numbers are non-negative. Another way of saying that a (non-negative) integer is a square number, is that its square root is again an integer. For example, √9 = 3, so 9 is a square number.

Question: can a negative number be a perfect square?

Is the answer True or False? Respond with only "True" or "False" and no additional text.
False.