David Bremner <david@tethera.net> writes:

> This is a design-choice/quirk of the Xapian query parser, discussed
> under "Operators" in man notmuch-search-terms; terms with a common
> prefix are implicitely combined with an OR.
> I don't think that documentation has changed since 0.23, but you can
> compare with https://notmuchmail.org/manpages/notmuch-search-terms-7/

Ok, now I understand that text. Thanks. I tried using "tag:important and
tag:unread" yesterday, and it didn't work either.

Today I am wondering if maybe I had threads that had some messages
marked important and some marked unread, but no individual messages
marked both unread and important. Oh well, maybe this was the real
reason I was having problems.

Thanks for your response.
-- 
Brian May <brian@linuxpenguins.xyz>
https://linuxpenguins.xyz/brian/
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