Over twenty three years ago, Exploratory Testing was defined by Cem Kaner as simultaneous test design, execution and learning. The concept isn't new, and all testers engage in some sort of exploratory testing at least some of the time. However, it is often misunderstood, and sometimes dismissed as "ad hoc" or "unstructured". This discussion will shed some light on the topic, from the perspective of an exploratory testing practitioner.