Failure-to-warn claims in products liability suits face special problems in proving causation. Many courts have responded by establishing a rebuttable presumption that a plaintiff would have read and heeded an adequate warning if it had been provided. In this Contribution, Jessica Christy (’21) considers arguments that this “heeding presumption” ultimately undermines the well-being of consumers, and concludes that such concerns are best addressed by rigorously defining “warning defect,” not by abolishing the presumption of causation.