easy · LSAT Logical Reasoning

A city council member argues: our city's average resident income has risen by 10 percent over the past three years. This proves that the economic well-being of the majority of our citizens has improved significantly.

The reasoning in the argument is flawed because it:

  1. neglects the possibility that the city's overall cost of living has fallen sharply during the same period.
  2. treats a statement about a group's average as though it described what is true for most members of the group.
  3. assumes the recent income gains resulted from deliberate city policies rather than from broader national trends.
  4. ignores that personal income is only one of several legitimate measures of an individual's economic well-being.
  5. concludes that not a single resident's income could possibly have declined over the relevant three-year period.

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