Debatable /(?)/

De·bat·a·ble

Debatable

a.
  1. Liable to be debated; disputable; subject to controversy or contention; open to question or dispute; as, a debatable question.

Phrases & Compounds
The Debatable Land [or] Ground
a tract of land between the Esk and the Sark, claimed by both England and Scotland; the Batable Ground.