On Wed, 29 Jun 2011 22:40:07 -0700, Carl Worth <cworth@cworth.org> wrote:
> This means that messages can lose the "unread" tag while still remaining
> tagged "inbox", (you read a message, but don't archive it), and that
> messages can lose the "archive" tag while still remaining tagged
> "unread", (you archive a thread before reading all messages in the
> thread).
> 
> The distinction ends up being useful to me. If at some point someone
> points me to a specific message, and when I search for it I see the
> "unread" tag, then this highlights to me that I never even looked at the
> message.

IMHO this is one of the awesome things about notmuch (and I've actively
used it to go back on conversations I previously ignored)

-- 
Stewart Smith