  Charge symmetry in hadronic reactions, either verified or violated, appears
to be in some circumstances a mandatory guide for model-independent
understanding of the structure and dynamics at play. The recent demonstration
of the PEPPo concept for the production of polarized positrons opens new
physics perspectives at the Jefferson Laboratory. Polarized positron beams, in
complement to existing polarized electron beams, are shown to bring
multi-Physics opportunities.
