Aneristic is the opposite of eristic and stems from Discordianism.
Discordianism is a religion (or philosophy) devoted to Eris, the Greek Goddess of strife and warfare. The Greek myth describes Zeus neglecting to invite Eris to the wedding of Pelius and Thetis's wedding. Eris is angry and throws a golden apple labeled "to the most beautiful" into the wedding crowd. Three goddesses claim it and their rivalry and actions cause the Trojan war.
Since according to the Discordians, eristic means apparent disorder and chaos, aneristic has to do with apparent order. Discordianism sees both as an illusion and order and disorder as illusions that humans cling to. Under that lies the truth of chaos.
Eristic also means "characterized by disputatious and often subtle and specious reasoning"(3). Another meaning of aneristic could them be "characterized by kind, clear and logical reasoning".
I like that the core word is the disorder one and the longer opposite one is the order one. The opposite of what I expect. It's all an illusion anyhow, right?
1. https://en.wikipedia.org/wiki/Discordianism
2. https://www.urbandictionary.com/define.php?term=Aneristic
3. https://www.merriam-webster.com/dictionary/eristic
Iron 2023: 12