Figure 1: Graphical presentation of the parameter space examined by Jaffe, Jenkins, and Kimchij [11]: the triangle altitude corresponds to the sum of quark masses $mT=Σimi$. The quark mass is given by the perpendicular distance from the corresponding side. Our Universe corresponds to the point marked by the arrow on the middle triangle. The green (red) bands represent congenial (uncongenial) worlds and the white region requires further investigation.