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Right. A good test for a conversational AI is whether it could perform the Abbott & Costello “Who’s on First” sketch with you. It should make assumptions where the characters in the sketch make assumptions, and ask questions borne from confusion where the characters do.

"The average time in London is 5.53 pm"

I mentioned in another comment that with Siri, this exchange does work:

“What time is it in London?”

... gives answer for London Ontario

“No, London England”

... gives answer for England

However there’s no memory to this; the same thing happens next time you ask.