reserve MS for OrtAfPl;
reserve MP for OrtAfSp;

theorem Th15:
  MS is Euclidean Desarguesian implies MS is Pappian
proof
  assume MS is Euclidean Desarguesian;
  then MS is satisfying_3H & MS is satisfying_DES by Th8,Th11;
  then MS is satisfying_PAP by CONMETR:13,15;
  hence thesis by Th10;
end;
