This is a quote from the commentary on Samkhya Pravachana Sutram Book 1:152
Vijnana Bhiksu has stated here, the properties belonging to Purusa:
Birth - is a property of Purusa in the form of - Conjunction
Death - ------------------------------------ Disjunction
Bondage ----------------------------------- Experience
Release ------------------------------------ Non-experience
He then echos “…only properties which possess the the form or nature of transformation [i.e. guna], and none else are denied in regard to Purusa.”
Note that the identification of properties of the Purusa answers the argument that if Purusa has no attributes, one is indistinguishable from another.
It goes further, identifying not just four properties, but two sets of contradictory properties. In other words, the theory of one self is impossible because it would entail the existence of contradictory properties in the one self. One self cannot have properties of both conjunction and disjunction at the same time, and similarly cannot have properties of both experience and non-experience at the same time. Hence the saying, under the theory of one self, if one is born, all would be born, and if one dies, all die. If one is bound, all are bound. If one is released, all are released.