>>38319749>Is there an actual reason the potential form isn't used here?My guess would be that 分かる/分からない already implies the ability/inability to understand something, dunno
Did some googling and found this though
https://hinative.com/ja/questions/158525>「I don't understand」の意味は「分からない」のこと>そして「I can't understand」は「分かれない」のことです。>"I don't understand," is more natural in most situations.>"I can't understand" suggests that you do not understand, and you will continue to not understand. 