Two  Chief  Divisions  of  the  Case.  —  From  the  outlines
(pp.  151,  152)  it  is  apparent  that  the  two  chief  divisions  into
which  a  case  may  be  divided  under  a  proposition  of  policy
will  center  about  the  direct  discussion  on  the  main  proposi-
tion and  about  the  discussion  on  some  substitute  policy  or
policies.
These  two  chief  divisions  may  be  called,  therefore,  the
main  case,  involving  a  discussion  of  Points  A,  B,  and  C;
and  the  substitute  case  or  cases,  involving  a  discussion  of
Point  D  and  its  two  sub-points.
Four  Subdivisions  of  the  Case.  —  Under  the  two  chief
divisions  of  a  case  for  a  proposition  of  policy,  there  may  then
be  other  subdivisions  that  will  be  determined  by  the  burden
of  proof1  on  the  various  points  in  the  outlines  (pp.  151, 152).
Wherever  one  side  has  the  obligation  to  advance  construc-
tive proof  on  any  of  these  points,  it  has  the  burden  of  proof,
and  must  take  the  initiative  in  advancing  proof.
Another  glance  at  the  outlines  (pp.  151,  152)  will  show  that
the  Affirmative  has  the  burden  of  proof  on  Points  A  and  B;
that  the  Negative  has  the  burden  on  Point  C  and  again  on  the
first  sub-point  under  D;  and  that  the  Affirmative  has  the
burden  on  the  second  sub-point  under  D.
The  most  natural  subdivisions  of  the  case  under  the  two
chief  divisions  would  be,  therefore  :

First  Subdivision  —  Points  A  and  B.
Second  Subdivision  —  Point  C.
Third  Subdivision  —  First  Sub-Point  under  Z).
Fourth  Subdivision  —  Second  Sub-Point  under  D.
1  See  pages  18-19.
