Some discussion here:

@broccoliforest The author of the post you're commenting on is always notified

If you'd like to notify someone else, you can add their name with @

It's a little confusing, though―sometimes the system automatically removes the @ notification from the post

And sometimes it seems to notify the previous commenter

I honestly don't know what they were thinking when they designed it

But in general you can choose to notify two people (the owner of the post, and one other person)

(You can't put multiple @ notifications in a single comment)

You can insert multiple at-signs in a comment if it contains a single ` character

But then I'm not sure if they work as notifications

In chat, you can notify multiple people at once :-D

We tend to use "formal noun" for 形式名詞 on this site, although as everywhere there are lots of terms in use for everything

"Abstract noun" is the opposite of "concrete noun" in English

The distinction in English is related to countability

I know people talk about abstract nouns in Japanese but I don't know what significance it has in that context…

Martin writes of Japanese: "Abstract nouns (正義 'justice', 美 'beauty', 善 'goodness') can be quantified, as in 少しの正義, but not counted or measured. By Isami's criteria they differ from action nouns only in not taking …をする: they are not actions that can be engaged in." (Martin 1975 p.178)

He seems to be reporting the distinctions made by 勇康男 in「日本語の構造」(1965)

I'm not really familiar with the term in a Japanese context…

Good ol' grammar

A nice, specific tag

How often do you think people pronounce 場合 as ばわい rather than ばあい?

Oh, people say ばわい fairly often

But I think it's looked down upon as an error

Hehe, tokiwa.cocolog-nifty.com/kotatsu/2007/05/post_9e0d.html

Hey, 明鏡 mentions it in their definition: ♦ 「ばわい」「ばやい」は「ぐわい(具合)」「しやい(試合)」などと同様、変化した形。

> [...] baai <> bawai, which tries to avoid repeating the same vowel twice.