Perfect Bayesian Equilibrium
Table:
Perfect Bayesian Equilibrium
Subset of	Bayesian Nash equilibrium
Proposed by	Cho and Kreps[citation needed]
Used for	Dynamic Bayesian games
Example	signaling game

With reference to the table, state whether the hypothesis is entailed, neutral, or refuted. Provide the verdict inside {"answer": "YOUR ANSWER"} as JSON.

Assertion: Cho and Kreps worked together for many years before proposing the concept of perfect Bayesian equilibirum

answer: neutral