Expert systems are included in the AI field.
Well it might be possible that things are labelled a little differently in Canada, but when I was studying them about 10 years ago an Expert System wasn't consider an AI because they had not capacity to learn, they merely used search parameters to locate stored knowledge and retrieve it. It's like calling a MSAccess an AI because it can create an SQL search string based on what is entered into a form and then evaluate it and return the data to you.
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