I'd vote for just ripping out the:
| A third state, "unknown", is represented by the SQL null value.
sentence entirely. I see no reason why NULL should be talked about in
particular on the page about boolean data types; there are many data
types, any of which might be NULL.
NULL is not unique
Two small patches attached, based on recent documentation comments
suggested on the web site.
First alters a few places that ALTER USER is suggested, mainly in the
context of changing per-user settings. If you're reading the HTML
documentation, and you click on ALTER USER, it takes you to a s