One concept related to conceptualism that he has introduced is the "uncertainty funnel."
The uncertainty funnel is a metaphor used to describe how uncertainty is often simplified and narrowed as it is communicated to the public. At the top of the funnel, there is a wide range of possible outcomes and levels of uncertainty. However, as information is passed through various channels, such as media or government, the range of outcomes and uncertainty is narrowed, resulting in a much simpler and more straightforward message being delivered to the public.
Spiegelhalter argues that this process of simplification can lead to misunderstandings and misinterpretations of risk and uncertainty. By being aware of the uncertainty funnel, researchers and communicators can work to provide more accurate and nuanced information to the public, helping them to make more informed decisions.
I would have put the concept of the uncertainty funnel in the "pure theory" section of the slide.