I've already read through this post, and I know "OP" stands for Original Poster. Now I would like to know what is "OP" referring to for nested citation?
asker A posted a question (question_1) where an article is cited,
and then Answerer B posted an answer to that question
and then asker C posted another question (question_2) where question_1 is cited.
Now, when answerer D use the term "OP" in answer to question_2, what is "OP" referring to?
when answerer B use the term "OP" in answer to question_1, what is "OP" referring to?