Answer: The word or phrase which best replaces the underlined part of the sentence to remove the logical fallacy is:
that person.
Explanation:
Even though there isn't any underlined word in the sentence, it can safely be assumed that the word would be "people". A fallacy exist in using "people" because, before, the speaker began by talking about "someone".
Someone is just one person. How then did we go from one person to many people? Why is it that this particular someone not learning something results in many people never developing skills? There is flawed reasoning here. Therefore, to correct it and to remove the logical fallacy, we have to keep the sentence as specific as it was from the beginning.
Hence, it should be that "If someone refuses to learn how to do something, that person will never develop new skills, and will struggle to get through life".
