Searle assumes a central locus of control
Searle presupposes any simulation of a native Chinese speaker will involve a central locus of control that manipulate symbols without understanding Chinese—but hasn't shown that a model without a central locus of control wouldn't understand Chinese.
Jacquette cites a version of a computational system that simulates the brain's microlevel functional structure as an example of a model that would lack any central locus of control.
Dale Jacquette, 1989.