Flow的缩进，真的只是在以下情形中出现吗？
- A的留言
- B的留言
- C的留言
此时如要回复A或B的留言，便会有缩进。回复C的留言不会有缩进。
然后D只是单纯想要就主题留言，这时就没法区分D是否是回复C了。另外：
- A的留言
- B的留言
- D的留言
- C的留言
- E的留言
这种情况下，也不容易看出D和E两人的留言时间先后与它们之间的关系。(话说这是不是应该发到WP:VPA去。。。。
在维基百科:知识问答/存档/结构式讨论的话题
这个话题的讨论已经结束，问题已解决。这是个早就被注意到的问题了，就这样了。
（同感，終於有人提出了
@Tigerzeng, in your case, D replies to B and E replies to everyone or just to C. E can use mentions (提到一位使用者 / 提及一位用户) to make its message more clear.
You can have more information about this on Help:Flow/Quick_tour/zh.
記得flow剛推出時，第一個問題就有人提出了，看來到現在還沒解決
例如我的這個回覆光看排版無法看出是要回覆給Tigerzeng，或者回覆給Trizek (WMF)
@M940504 Like this if I'm replying to something specific you have said.
+1
@M940504 Like this if it is related to the main topic.
That's because you replied him/her after 胡蘿蔔's reply so that your reply to M940504 is indented. I'm sending this message by clicking the reply botton on your reply and it will not be indented.
这个问题已经有人问过了，phab:T94924。
@Tigerzeng The last reply button will not indent. You can see how the system works now as a story : you can add a new event to the story (at the end - when you reply), or add an event between two existing elements (reply to an existing message, except the last one).
@GZWDer, there is a groupe of tasks about moving the threading model, based on user selection (T105438 and T108998).