They are taking part in a symposium entitled:
Cognitive Archaeology: The Challenge of Understanding Human Becoming
The symposium aims state the following:
Cognitive Archaeology tries to understand how ancient peoples thought by systematically interpreting the artefacts they left behind. However, the act of interpretation presupposes the need for answers to fundamental questions: What is cognition (Edelman & Tononi, 2000), and what is the role of materiality in it (Knappett, 2005; Malafouris, 2013)? What are the causes of change in hominin–human cognition over the last two million years? Finally, how does understanding the answers to these questions make a better archaeologist?
Neither Yvan nor Tom propose to deal with the final clause!