Debatable means something can be reasonably argued from different sides because people have legitimate reasons to disagree about it. When a question is debatable, there's no single obvious right answer that everyone accepts.

Consider whether chocolate ice cream tastes better than vanilla. That's debatable because people genuinely prefer different flavors. But whether Earth orbits the Sun? Not debatable. That's a proven fact. The difference matters: debatable topics involve opinions, values, or situations where smart people examining the same evidence can reach different conclusions.

In a classroom debate, students might argue whether schools should have longer recess. Both sides can make strong points: one team argues kids need more time to play and recharge, while the other argues that more instructional time helps students learn. Neither side is obviously wrong. That's what makes it genuinely debatable.

Sometimes people use debatable to politely suggest they disagree with something. If your friend claims they're the fastest runner in school and you say “that's debatable,” you're hinting that others might dispute that claim. The word acknowledges that reasonable people can look at the same situation and come to different conclusions.