Hence, followed Einstein, Podolsky, and Rosen in 1935 in their famous "EPR paper", there is something missing in the description of the qubit pair given above—namely this "agreement", called more formally a hidden variable.
An ebit, a two-party quantum state with quantum entanglement and the fundamental unit of bitpartite entanglement
U.S. state | Georgia (U.S. state) | São Paulo (state) | Secretary of State | Washington (U.S. state) | state | United States Department of State | Moscow State University | United States Secretary of State | Ohio State University | Michigan State University | New York State Assembly | State Senator | New York State Senate | Rio de Janeiro (state) | Louisiana State Legislature | Alexander Graham Bell | Iowa State University | Pennsylvania State University | Louisiana State University | Bell Labs | Santa Catarina (state) | Florida State University | Paraná (state) | Vienna State Opera | Oregon State University | California State Assembly | Arizona State University | University at Buffalo, The State University of New York | Wayne State University |