  I rephrase my earlier arguments that vital information on the emergence of
space is buried in particle physics, and - in particular - in the Harari-Shupe
(HS) rishon model of leptons and quarks. First, it is argued that matter and
space should be treated more symmetrically than they are in the Standard Model.
Then, a generalization of Born's matter-and-space-relating concept of
reciprocity is introduced. A simple analogy between the resulting phase-space
picture and the original HS model is pointed out. It is stressed that in the
advocated view of the rishon model the concept of "compositeness" is completely
different from its standard understanding, implying one-dimensionality of
rishons, and thus the non-existence of "preons".
