I asked a question about Linux's unstable API yesterday. Two users Artem S. Tashkinov and Philip Couling answered that question. Artem S. Tashkinov answered with just a link. After some time that answer disappeared and Philip Couling gave another answer with more details. Then Artem S. Tashkinov and Philip Couling started to debate. Artem S. Tashkinov claimed that Philip Couling's answer is not an answer but an opinion.
From Tour page, It's not a discussion forum. There's no chit-chat.
Is it OK to debate like this?