What I need to do is to solve Einstein's riddle but without using list. How to do this? I tried many times, but I couldn't find the solution. Thank you for your answers.
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2Does this answer your question? [Einsteins Riddle Prolog](https://stackoverflow.com/questions/9252656/einsteins-riddle-prolog) – Armatorix Nov 14 '21 at 00:22