Understanding Logical Fallacies to Identify Flawed Arguments

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Correction history

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1. 29 July 2026 · corrected by Emir Baycan

   Corrected a misattribution: the drinking-age card-selection variant was credited to Peter Wason's own follow-up research, but was actually designed and run by Griggs and Cox (1982), 16 years after Wason's original abstract task. Also corrected the stated drinking age from 21 to 19, matching the real study.

   Before

   Wason's follow-up research showed that the error rate dropped to 65-75 percent correct when the rule involved someone drinking beer and being over 21.

   After

   Later research by Griggs and Cox (1982), not Wason himself, showed the error rate dropped to roughly 70-75 percent correct with the same social-context rule, using the real study's drinking age of 19.

   Why: Verified the Wason selection task and the beer/drinking-age variant against the actual research literature; the social-context version is a separate, later study by different researchers, not a Wason follow-up.

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Full contribution timeline

1. Correction 29 July 2026

   Emir Baycan: Corrected a misattribution: the drinking-age card-selection variant was credited to Peter Wason's own follow-up research, but was actually designed and run by Griggs and Cox (1982), 16 years after Wason's original abstract task. Also corrected the stated drinking age from 21 to 19, matching the real study.

   Proof record →