For a true/false or a prove/disprove question, ask what would constitute a counterexample.

For a true/false or a prove/disprove question, ask what would constitute a counterexample. You should be especially aware of whether you are trying to show that something always holds, or whether you are you are being asked to find a specific case where something holds. Another question to ask yourself in this phase is whether the data really determine the unknown. Is there really a solution? More than one solution?