Significats de eristical en anglès

He belonged to the fighting class, and was further distinguished as a hero of debate, who professed the eristic art.

The philosophy which in the first and second generation was a great and inspiring effort of reflection, in the third becomes sophistical, verbal, eristic.

The Aneristic Principle is that of order, the Eristic Principle is that of disorder.

Here, then, is a double indication of the connexion of the Parmenides with the Eristic school.

But I still get confused about the differences between the Erisian, the Eristic and the Discordian.