Computational functionalism is wrong.
Computational functionalism says that, whenever a creature has certain psychological characteristics, the psychological functioning of the creature can be completely captured by a computer program, so that any other system whose functioning can be captured by the same program has those psychological characteristics. Any program could be written as a set of instructions to be carried out by a person. A person who does not understand Chinese could carry out a computer program without thereby coming to understand Chinese. The functioning of a person carrying out a computer program is captured by that computer program. The syntax-semantics argument Syntax is not sufficient for semantics.