Sure, they ‘know’ the context of a conversation but only by which words are most likely to come next in order to complete the conversation. That’s all they’re trained to do. Fancy vocabulary and always choosing the ‘best’ word makes them really good at appearing intelligent. Exactly like a Sales Rep who’s never used a product but knows all the buzzwords.
Really it’s crowdsourcing and statistics. Show an image to a big enough crowd and someone will pick something up. It’s like the birthday problem but with geography.