How to see that a variable holds t

[Cecil Westerhof]

At the moment I have the following function:
    (defun switch-gnus-idle-daemon-do-log ()
      (interactive)
      (setq gnus-idle-daemon-do-log
            (case gnus-idle-daemon-do-log
              (10        t)
              (otherwise 10)))
      (message "gnus-idle-daemon-do-log: %s" gnus-idle-daemon-do-log))

I know that it looks like overkill a case for switching to two values,
but I expect that in the future there will be more values.

What I really would like is;
    (defun switch-gnus-idle-daemon-do-log ()
      (interactive)
      (setq gnus-idle-daemon-do-log
            (case gnus-idle-daemon-do-log
              (t         10)
              (otherwise t)))
      (message "gnus-idle-daemon-do-log: %s" gnus-idle-daemon-do-log))

Because I would like the default to be t and not 10. (For when the value
is not one of the defined values.) But when I do this, it is always set
to 10, because the case does not make a difference between t and 10. How
do I solve this?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof