Reverse turing test

A short quiz about interaction systems

If you too study something that can meaningfully be called an « interaction system », i.e. a system comprised of interacting parts that are responsible for the behaviour of the system as a whole, then, here is a quiz designed to help put us on the same page research-wise.

Each question is meant to be elementary and easy to answer. If you find a question to be otherwise, please do let us know by using the « I HAVE AN ISSUE » button. By understanding why a question is not as basic as we think, we learn how to improve the quiz.


This quiz on 'time and change in interaction systems' is a particular instance of reverse Turing test. Its purpose is to identify information that a scientist's human mind has and is using, but that is not yet soundly contained in any pre-existing formalisation (s)he is manipulating of the systems (s)he is studying. Often, it is the kind of information that implicitly justifies the choice of formalisation and the interpretations of its various features. This is useful information since it is being made use of. And once explicited, it can be further used to augment and/or to challenge familiar formalisations. And precisely, there is nothing already soundly formalised that can yet suggest this information.

The use of the term « formalisation » instead of « model » is delilberate. The term « model » is easy to use on its own without specifying « a model of XXX ». This is a little less true for the term « formalisation ». A model usually refers to a formal system with the alledged property of representing something less formal than itself such as a specific piece of « Reality ». The use of this term is a gratuitous justification for shifting all scientific attention from the less formal objects onto the formal ones. It conceals fundamental questions about levels of formalisation/abstraction and information relative to them ( eg : What information is carried at one level about the next ? How does information carried by independent formalisations of the same system relate to one another ? How can they co-exist meaningfully ? What kind of information evidences that ?) – precisely the type of questions motivating this quiz and generally, research on 'information in the dark'.