An alien drops onto the planet, and the only books he reads are horatio alger, jr., novels. the alien concludes that:

The alien concludes that the rags-to-riches narrative of social mobility is true and realistic.

As it turn out many considerations need to be made from the rags to riches narrative. For example, it is true that as individuals we need to work hard to achieve success in our career, but we can't deny the fact that born in wealthy family will give children a clear competitive advantage in education or ways to raise capitals for the business, which make it harder for poor people to actually become wealthy.