Which logical fallacy is used in the text?
How could Lexi have anything insightful to say about foreign affairs? She grew up on a farm.

 - hasty generalization: a broad claim based on too few observations
 - straw man: a misrepresentation of an opponent's position that makes it easier to argue against
 - ad hominem: an attack against the person making the argument, rather than the argument itself
The text argues that Lexi cannot be insightful about foreign affairs because she grew up on a farm. This is a personal attack that isn't relevant to whether she knows about foreign affairs. This illustrates a type of logical fallacy known as ad hominem.