This Wikipedia page has a lot of filling algorithms, and none of them looks like it's AI-based: https://en.wikipedia.org/wiki/Flood_fill
Can anyone explain me why the fill tool in Paint was considered AI? Has the definition of "AI" changed?
Should graph search be considered AI? This gets us to the root of the issue, which is how do we consider something AI or not and to what extent has that definition changed as some problems have become trivial or commonplace. Machine learning is a bit easier since you can create much strong classifications around the need to teach, to feed it data with expected results, before it is useful to get a response (or otherwise give it a way to evaluate data it generates and then feeds itself). However there are a number of techniques that predate ML, or at least having fast enough computers to have worthwhile success at ML, and thus we are left with determining some way to objectively classify those as either AI or not.
AI today is the study of optimizing NP problems through a series of educated guesses.
https://en.wikipedia.org/wiki/AI_effect
It would seem that the AI goalposts are always being moved.