This is a phenomenon known as the conjunction fallacy

So why do statements with more conditions sometimes seem more believable?This is a phenomenon known as the conjunction fallacy.When we're asked to make quick decisions, we tend to look for shortcuts.In this case, we look for what seems plausible rather than what is statistically most probable.On its own, Lucy being an artist doesn match the expectations formed by the preceding information.The additional detail about her playing poker gives us a narrative that resonates with our intuitions?it makes it seem more plausible.