The dramatic spread of COVID-19 has given rise to widespread "mis"information and "dis"information. Even seasoned journalists have to work hard to avoid misinformation, a term for, among other things, inadvertent mistakes made in the reporting process. More troubling are the numerous examples of deliberate fabrications, or disinformation. The latter can be difficult to identify with certainty, as it is not always clear where a claim originated. But any kind of unfounded speculation or conspiracy theory can be problematic if people start to believe or even act on it. This article discusses how to protect students and ourselves from the panoply of pollutants running amok in information ecosystems. Instead of taking aim at specific examples of misinformation and disinformation (the approach of many other interventions with similar aims), Mind Over Chatter (MOC) teaches students to recognize the enemies within. Students learn how our minds' innate and sometimes irrational tendencies in processing information--what psychologists call cognitive biases--can make us all susceptible to misinterpretation and deception. In engaging with MOC's online modules, students identify and analyze different kinds of cognitive biases in video clips, excerpts from news articles, and hypothetical scenarios.