People are regularly confronted with environmental and science-related issues presented to them in newspapers, on television, or even in their own doctor's office. Often the information they use to inform their decisions on matters of science may be ambiguous and contradictory. This article presents an activity that investigates how students deal with ambiguity in scientific data and whether they use such information to make decisions. The activity connects to the Next Generation Science Standards (NGSS Lead States 2013) practices of analyzing and interpreting data (Practice 4); engaging in argument from evidence (Practice 7); and obtaining, evaluating, and communicating information (Practice 8).