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Uncertainty of conclusion (x-axis) vs. summed uncertainties of premises (y-axis) for the four conditional inferences. Each data point shows a single response to one inference. For MP and MT, p-validity is violated if data points fall in the upper triangle (i.e., uncertainty of the conclusion is larger than the uncertainty of the premises). For AC and DA no such restriction exists. The numbers in the upper left corner show the percentages of data points in the upper triangle.
