The differential diagnosis is at the heart of analytic thinking for the diagnostician.  Dr. Mark Graber agrees.  As the founder of the Society to Improve Diagnosis in Medicine, he should know.  It can overcome many of the biases we are prone to when we limit ourselves only to diagnosis by pattern recognition.  We discuss some simple approaches to generating a differential diagnosis and developing a problem representation.

We continue laying the foundations of type 1 and type 2 thinking with a discussion about biases.  Once again we hear from Prof. Gurpreet Dhaliwal and some of his thoughts on the utility of studying metacognition.