allow-other-keys query

[mips!earl@glacier.stanford.edu (Earl Killian)]

Given
	(defun bah (&key humbug)
	  ...)
which of the following are legal?
  1	(bah :allow-other-keys nil :other 'blah)
  2	(bah :allow-other-keys t :other 'blah)
  3	(bah :allow-other-keys nil)
Certainly 1 is in error and 2 is legal.  What about 3?  The way I read
the manual this is an error, which I don't think is the intent of this
feature.  Opinions?