Here is a list of Surprising Turing-complete things: https://www.gwern.net/Turing-complete https://www.gwern.net/Turing-complete Wang tiles are on the list. A

Here is a list of Surprising Turing-complete things: https://www.gwern.net/Turing-complete https://www.gwern.net/Turing-complete Wang tiles are on the list. Are they Turing-complete by themselves? Or do they become Turing-complete only when an agent attempts to arrange them?