I am curious as to how this will work. How does bot A simulate bot B that must simulate bot A to determine its answer? Seems like infinite trampoline recursion

I am curious as to how this will work. How does bot A simulate bot B that must simulate bot A to determine its answer? Seems like infinite trampoline recursion. EDIT: it seems you run the simulation against a different bot implementation than the running one and attempt to determine its characteristics given the responses and the known behaviour of the other implementation.