The term 'Paradox' within the context of this site, and the books by Stephen Pirie, is used to convey the irreducible complexity of being 'same' while being 'different'. The 'while being' forms the paradox by joining two elementary realities, into one paradoxical, complementary experience of reality. 

The subject of 'Paradox' is covered in more detail, in for example, "Session 2 - two impossible ideas"