  Analysis of the recently proposed thought experiment with the path entangled
photon pairs is extended here to spin entangled electron pairs. The detailed
comparison of the two cases showed the range of distinctions and similarities
in their monitoring. The general results contradict the Concurrency Rule
stating that intimately linked characteristics of a simple system must change
concurrently under changing conditions. Instead, the analysis showed that the
systems coherence, while changing continuously with entanglement strength on
the global scale, remains zero on the local level. This effect, common for bi
photons and bi fermions, can be named total mutual intolerance between local
and global coherence. We can thus predict mutual intolerance as a general
effect for all pairs of entangled qubits regardless of their physical nature.
  Key words: Bi photon, bi fermion, entanglement, correlations, coherence
transfer
