. . "critical phenomenon" . . "criticality" . "Critical phenomena" . "non-arbitrary threshold" . . . "nested models linked via parametric space" . . . . "threshold that is not arbitrary" . "critical phenomena" . . "critical behavior" . "critical" . "collective (critical) phenomena" . . . "critical dynamics" . "critical point" . "critical collapse" . "Critical Phenomena" . "Critical phenomena" . .