Passage Summary: Since scientists haven't been able to prove that psychics are fake, psychics must be real.

Conclusion: Some individuals possess extrasensory perception (ESP).

Reasoning: It has not been scientifically proven that ESP does not exist, and many attempts to find such a proof have failed.

Analysis: This argument is a textbook example of the 'Appeal to Ignorance' fallacy. The fortune-teller treats a lack of evidence for a negative (that ESP doesn't exist) as positive evidence for the affirmative (that ESP does exist). In logic, failing to prove 'not-X' is not the same as proving 'X.' Look for an answer choice that identifies this specific flaw—concluding that a claim is true simply because it hasn't been proven false.