The classic dating miscommunication strikes again! Two people connect over their mutual love of "train models" - but they're talking about completely different things. He's thinking of actual miniature railroad models (choo-choo!), while she's referring to machine learning models for training AI algorithms (beep-boop!).
It's basically the modern tech version of "I thought you meant that kind of Python!" The diagram she shows is a typical neural network flowchart - the kind data scientists dream about while the model train enthusiast is busy perfecting his tiny railroad crossing. Two nerds, two worlds, one hilarious misunderstanding!
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