The understanding in this article is about as dated as the use of BASIC, probably speaks to the age of the author.
In 1969 Konrad Zuse proclaimed that the whole universe is a cellular automaton – a computing device. But if we do not know all the laws of the universe, and, consequently, have no idea what the ultimate computing device is, then how can we say that the universe is a cellular automaton?
The answer to this "conundrum" lies not in the lack of knowledge of the rules of the universe, but in the a priori assumption that the universe works based on rules.
What are "rules"? Are rules ontic or epistemic artefacts? Rules are artefacts of grammar. Formal grammar. Mathematics.
And so it follows by definition that IF the universe operates on rules THEN the universe is a Turing machine.
It also follows by induction: ALL laws of physics are Mathematical. Mathematics is a Formal language. Turing machines are formal language recognisers. If the universe is physical, and Mathematics captures physics then the universe is a Turing machine.
And since the
Curry-howard correspondence the claim "The Universe is cellular automaton" is equivalent to the claim "The Universe is Logical". If you reject one, you have to reject the other.
Following the American philosopher John Searle, one might say that the mind is a biological machine, but that it does not operate as a symbol manipulation device as a Turing machine does. Searle is famous for his ‘Chinese Room’ argument, which aimed to show that the human mind is more than a symbol manipulator. Roughly, the argument is that someone who does not speak Chinese can perfectly answer questions in Chinese by just manipulating symbols in Chinese (that is, Chinese words) according to a big book of rules. However, there is no understanding of Chinese involved: the operator doesn’t know what the symbols mean
Searle is a misguided fool. He attacks blind symbol manipulation, but his entire argument rests upon the meaning of the symbol "understanding".
Does the person making; or agreeing with the argument understand what the symbol "understanding" means?