Medieval debate poetry
Medieval debate poetry was a genre of poems popular in England and France during the late medieval period. The same type of debate poems broadly existed in the ancient and medieval Near Eastern literatures.
Essentially, a debate poem depicts a dialogue between two natural opposites (e.g. sun vs. moon, winter vs. summer). Although the particulars can vary considerably, this can function as a general definition of the literary form. The debates are necessarily emotionally charged, highlighting the contrasting values and personalities of the participants, and exposing their essentially opposite natures.
On the surface, debate poems typically appear didactic, but under this often lies a genuine dialogue between two equally paired opponents.