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A central flaw in the argument linking vaccines to autism is the logical error of assuming causation from correlation. The original controversial study reported that some children developed autism symptoms shortly after receiving the MMR vaccine. However, this temporal sequence is merely a correlation—two events happening around the same time—and does not prove that the vaccine caused autism. This is a classic example of the 'post hoc ergo propter hoc' fallacy, especially since the typical age for autism diagnosis coincides with the childhood vaccination schedule.

Correlation vs. Causation Fallacy in the Vaccine-Autism Debate

A parent observes that their child began showing symptoms of a developmental disorder around the same time they received a standard childhood vaccination. Based on this timing, the parent concludes the vaccine must have caused the disorder. Which statement best identifies the primary logical error in this conclusion?

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