By what definition, principle or authority do you determine what is AI?

Don't take this the wrong way, but I find that people with more knowledge of the subject tend to be more open about what they include, whereas people with less knowledge tend to do more gatekeeping. AI has a "moving goal post" issue that is notable enough to warrant a wikipedia page: https://en.wikipedia.org/wiki/AI_effect

Well, the acoustic model is created using deep learning loss-minimization by gradient descent, which is what people usually call AI these days.

Or ML.