This
'(1 "yes" "YES")
should be expanded to this
'(1 "yes" "YES" "Y" "Yes" "OK" Yep" "Youbetcha" "Alrightythen" "UhHuh")
which brings me to my point.....if you are going to do something like this, then I agree with Kerry
PLOTABLE? would be T or nil
Alan, this makes no sense to me:
(or plotable? (member plotable? '(1 "yes" "YES")))
if plotable is nil it will fail the first test which means it will also fail the second test, if it's not nil then it will never make it to the second test (and you have a misplaced ")")