TRUE
CLIPS> (batch "tmplmslt.bat")
TRUE
CLIPS> (clear) 
CLIPS> 
(deftemplate foo 
  (multislot a)
  (slot x)
  (multislot b)
  (slot y))
CLIPS>   
(defrule bar 
   (foo (a $?a) (b $?b) (x ?x) (y ?y))
   =>
   (printout t ?a " " ?b " " ?x " " ?y crlf))
CLIPS> (reset)
CLIPS> (assert (foo))          
<Fact-1>
CLIPS> (duplicate 1 (a) (b) (x 8))
<Fact-2>
CLIPS> (duplicate 1 (a) (b 1) (x 8))
<Fact-3>
CLIPS> (duplicate 1 (a 1) (b) (x 8))
<Fact-4>
CLIPS> (duplicate 1 (a 1) (b 1) (x 8))
<Fact-5>
CLIPS> (duplicate 1 (a 1 2) (b 3 4 5) (x 8))
<Fact-6>
CLIPS> (facts)
f-1     (foo (a) (x nil) (b) (y nil))
f-2     (foo (a) (x 8) (b) (y nil))
f-3     (foo (a) (x 8) (b 1) (y nil))
f-4     (foo (a 1) (x 8) (b) (y nil))
f-5     (foo (a 1) (x 8) (b 1) (y nil))
f-6     (foo (a 1 2) (x 8) (b 3 4 5) (y nil))
For a total of 6 facts.
CLIPS> (run)
(1 2) (3 4 5) 8 nil
(1) (1) 8 nil
(1) () 8 nil
() (1) 8 nil
() () 8 nil
() () nil nil
CLIPS> (reset)
CLIPS> (assert (foo (a) (b) (x 1) (y 2)))
<Fact-1>
CLIPS> (duplicate 1 (a) (b) (x 8))
<Fact-2>
CLIPS> (duplicate 1 (a) (b 1) (x 8))
<Fact-3>
CLIPS> (duplicate 1 (a 1) (b) (x 8))
<Fact-4>
CLIPS> (duplicate 1 (a 1) (b 1) (x 8))
<Fact-5>
CLIPS> (duplicate 1 (a 1 2) (b 3 4 5) (x 8))
<Fact-6>
CLIPS> (facts)
f-1     (foo (a) (x 1) (b) (y 2))
f-2     (foo (a) (x 8) (b) (y 2))
f-3     (foo (a) (x 8) (b 1) (y 2))
f-4     (foo (a 1) (x 8) (b) (y 2))
f-5     (foo (a 1) (x 8) (b 1) (y 2))
f-6     (foo (a 1 2) (x 8) (b 3 4 5) (y 2))
For a total of 6 facts.
CLIPS> (run)
(1 2) (3 4 5) 8 2
(1) (1) 8 2
(1) () 8 2
() (1) 8 2
() () 8 2
() () 1 2
CLIPS> (reset)
CLIPS> (assert (foo (a 1) (b 2) (x 3) (y 4)))
<Fact-1>
CLIPS> (duplicate 1 (a) (b) (x 8))
<Fact-2>
CLIPS> (duplicate 1 (a) (b 1) (x 8))
<Fact-3>
CLIPS> (duplicate 1 (a 1) (b) (x 8))
<Fact-4>
CLIPS> (duplicate 1 (a 1) (b 1) (x 8))
<Fact-5>
CLIPS> (duplicate 1 (a 1 2) (b 3 4 5) (x 8))
<Fact-6>
CLIPS> (facts)
f-1     (foo (a 1) (x 3) (b 2) (y 4))
f-2     (foo (a) (x 8) (b) (y 4))
f-3     (foo (a) (x 8) (b 1) (y 4))
f-4     (foo (a 1) (x 8) (b) (y 4))
f-5     (foo (a 1) (x 8) (b 1) (y 4))
f-6     (foo (a 1 2) (x 8) (b 3 4 5) (y 4))
For a total of 6 facts.
CLIPS> (run)
(1 2) (3 4 5) 8 4
(1) (1) 8 4
(1) () 8 4
() (1) 8 4
() () 8 4
(1) (2) 3 4
CLIPS> (reset)
CLIPS> (assert (foo (a 1 2) (b 3 4 5) (x 6) (y 7))) 
<Fact-1>
CLIPS> (duplicate 1 (a) (b) (x 8))
<Fact-2>
CLIPS> (duplicate 1 (a) (b 1) (x 8))
<Fact-3>
CLIPS> (duplicate 1 (a 1) (b) (x 8))
<Fact-4>
CLIPS> (duplicate 1 (a 1) (b 1) (x 8))
<Fact-5>
CLIPS> (duplicate 1 (a 1 2) (b 3 4 5) (x 8))
<Fact-6>
CLIPS> (facts)
f-1     (foo (a 1 2) (x 6) (b 3 4 5) (y 7))
f-2     (foo (a) (x 8) (b) (y 7))
f-3     (foo (a) (x 8) (b 1) (y 7))
f-4     (foo (a 1) (x 8) (b) (y 7))
f-5     (foo (a 1) (x 8) (b 1) (y 7))
f-6     (foo (a 1 2) (x 8) (b 3 4 5) (y 7))
For a total of 6 facts.
CLIPS> (run)
(1 2) (3 4 5) 8 7
(1) (1) 8 7
(1) () 8 7
() (1) 8 7
() () 8 7
(1 2) (3 4 5) 6 7
CLIPS> (reset)
CLIPS> (watch facts)
CLIPS> (assert (foo (a) (b) (x 1) (y 2))) 
==> f-1     (foo (a) (x 1) (b) (y 2))
<Fact-1>
CLIPS> (modify 1 (a 1))
<== f-1     (foo (a) ...)
==> f-1     (foo (a 1) ...)
<Fact-1>
CLIPS> (modify 1 (b 1))
<== f-1     (foo ... (b) ...)
==> f-1     (foo ... (b 1) ...)
<Fact-1>
CLIPS> (modify 1 (a 1 2))
<== f-1     (foo (a 1) ...)
==> f-1     (foo (a 1 2) ...)
<Fact-1>
CLIPS> (modify 1 (b 1 2 3))
<== f-1     (foo ... (b 1) ...)
==> f-1     (foo ... (b 1 2 3) ...)
<Fact-1>
CLIPS> (modify 1 (a))
<== f-1     (foo (a 1 2) ...)
==> f-1     (foo (a) ...)
<Fact-1>
CLIPS> (modify 1 (b 1))
<== f-1     (foo ... (b 1 2 3) ...)
==> f-1     (foo ... (b 1) ...)
<Fact-1>
CLIPS> (modify 1 (a 1) (b 1 2))
<== f-1     (foo (a) ... (b 1) ...)
==> f-1     (foo (a 1) ... (b 1 2) ...)
<Fact-1>
CLIPS> (modify 1 (a 1 2) (b))
<== f-1     (foo (a 1) ... (b 1 2) ...)
==> f-1     (foo (a 1 2) ... (b) ...)
<Fact-1>
CLIPS> (modify 1 (a) (b))
<== f-1     (foo (a 1 2) ...)
==> f-1     (foo (a) ...)
<Fact-1>
CLIPS> (unwatch facts)
CLIPS> (dribble-off)