The document summarizes a simulation of a geology conference where participants were presented with new evidence about the formation of Earth's surface and asked to determine if the current "baked apple" theory could explain it or if a new theory was needed. In breakout groups, attendees discussed three sets of new data and considered whether the evidence supported keeping or revising the current theory. At the end, they were asked to write a one page summary of the evidence and the theory their group developed to explain it.