==Open problem: Construct a non-hyperlinear group== A positive resolution to Connes' embedding problem would've [[https://arxiv.org/pdf/1309.2034.pdf|implied]] that all countable discrete groups are hyperlinear. Since MIP*=RE gives a negative answer to CEP, this leaves open the possibility that there are non-hyperlinear groups. One [[https://simons.berkeley.edu/sites/default/files/docs/15568/williamslofstraslides-quantumprotocols.pdf|approach]] to this is to create a linear constraint system (LCS) game $G$ whose commuting operator value $\omega^{co}(G)$ is different from its tensor product value $\omega^*(G)$. Thus, can the separating nonlocal game constructed in the MIP*=RE paper be formulated as a linear constraint system game?