medium · LSAT Logical Reasoning

A researcher reasons as follows: "Most professional athletes began their training before the age of ten. So if my daughter is going to become a professional athlete, she will need to start training before she turns ten."

The reasoning above is flawed in that it

  1. takes a trait shared by most members of a group to be a requirement for joining that group.
  2. overlooks that starting to train so young could heighten injury risk and derail an athletic career.
  3. assumes that what holds true of a group as a whole must hold true of each of its members.
  4. mistakes a correlation between two trends for a causal connection between them.
  5. presumes that early training is sufficient, by itself, to guarantee a professional athletic career.

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