Harsanyi’s theorem has also been generalized in various ways without the rationality axioms; see McCarthy et al., 2020 https://doi.org/10.1016/j.jmateco.2020.01.001. But it still assumes something similar to but weaker than the independence axiom, which in my view is hard to motivate separately.
Harsanyi’s theorem has also been generalized in various ways without the rationality axioms; see McCarthy et al., 2020 https://doi.org/10.1016/j.jmateco.2020.01.001. But it still assumes something similar to but weaker than the independence axiom, which in my view is hard to motivate separately.