Comment by cess11

Besides pengines and web development I have very little experience with SWI specifically.

And, well, yeah, it's common (e.g. look for cuts in https://github.com/mthom/scryer-prolog/blob/master/src/lib/c... ), but I don't think I've ever written a cut and I use Prolog rather effectively as a tool for problem solving. It's an interesting and quite powerful way to model and examine problems even if I don't produce programs with 'imperative' interfaces. Some scripting tasks are also quite easy in Prolog, e.g. certain log parsing, stuff like that.