 CD  X, ~X / Y           >E  X, X > Y / Y        R   Repeat Statement   
 &I  X, Y / X & Y        &E  X & Y / X (or Y)    ~E  ~~X / X            
 vI  X (or Y) / X v Y    vE  X v Y, ~X / Y       vE  X v Y, ~Y / X      
 QT  Quit                BK  Back to Line #      DC  X > Y, ~Y / ~X     
 ~U  ~(x)Fx / (Ex)~Fx    ~X  ~(Ex)Fx / (x)~Fx    DC  X > ~Y, Y / ~X     
 U~  (x)~Fx / ~(Ex)Fx    X~  (Ex)~Fx / ~(x)Fx    DC  ~X > Y, ~Y / X     
 UE  (x)Fx / Fa          EI  Fa / (Ex)Fx         ST  End AC or I       
 UI  Fa / (x)Fx          DM  ~(X&Y)  (~Xv~Y)    DM  ~(XvY)  (~X&~Y)   
 W   Y / X > Y           C   (X > Y)  (~X v Y)  C   ~(X > Y)  (X & ~Y)
 CP  (X > Y)  (~Y > ~X) CP  (~X > Y)  (~Y > X) CP  (X > ~Y)  (Y > ~X)
 E  X  Y, X / Y        E  X Y, Y / X         E  XY, XY / X > Y   
 E  XY, XY / Y > X    I  X > Y, Y > X / XY  A   Any Assumption     
͹
 X       X       ~X       ~X      X         X v Y      X       
                                      X               
 .       .       .        .       .                  Y       
 Y       .       Y        .       .          Z             ST  
 ~Y      Y&~Y    ~Y       Y&~Y    Y              ST    Y       
 ~X   ~I  ~X   ~I  X    RD   X   RD  X > Y  >I    Y               
͹           X       
 (Ex)Fx   X v Y    TELLER SYSTEM RULES ۺ   Z                 
  Fb     X > Z    PRESS ANY KEY TO CONTINUE ۺ       ST         ST  
       Y > Z   ͼ  Z    AC   XY   I  
  X      .        "/" Means Statements on Left Imply Statement on Right 
 X   EE   Z    AC  "" Means Left Implies Right and Right Implies Left   