[Drdrdrq]

A bit off topic: did you really use Prolog for something else than just research? That is, did you write software that was used in production? I have learned it many years ago but always had a nagging feeling that it is better to use a "normal" language with AI libraries if you need the program to actually do something... Did I miss anything?

[drdoom]

Most of my Prolog experience was in academics - for my own research as well as for maintaining some existing packages. But I did get to use it outside as well. There are many cases where a controlled language is needed or comes in handy and solves a lot of issues. This is where Prolog shines - plus you get to use a lot of the previous stuff you developed as well.

When it comes to an "AI" language vs. typical language with an "AI" library, I will just repeat a phrase that is often used in the field: what you thinnk of as an AI problem today will no longer be considered AI tomorrow, since it will then be well-understood and implemented in many places. People used to say that in response to the (seeming lack of) progress AI had made to date. A good example of that is Siri or Amazon Echo. Not many people consider it an AI problem anymore, or so it seems.