anchor.diff:                  nspawn = 0
               end if
   
  -        else if (choose_double_elt_type <= Po_ + P_o ) then elttype
  +        else if (choose_double_elt_type <= Po_ + P_o ) then 
               !          _
               !         / \
               !    .____\./
  
positive.code:         ! **however, the values of P__ etc will ideally be reference-determinant dependent, what is the best way to order this sequence?**
  
  
  elttype:if(choose_double_elt_type <= Po_ ) then
              !     _
              !    / \
              !    \./____.
  
negative.code:             end if
  
  
          else 
              
              !      __   __ 
              !    ./  \./  \.
  