 To conclude our discussion of Bold Physical CTT, it may be helpful to distinguish the issue of physical computability proper—the issue that pertains to the physical analogue of Mathematical CTT—from other issues that connect computability and physics. Many questions about the relationship between physical processes and computability deserve to be asked. What are the physically computable functions? This is the question that should motivate Physical CTT. What can be computationally approximated to what degree under what circumstances? This is presumably what (A) is after. As important and interesting as this question is, it is different from the question of what can be physically computed. Yet other questions motivate theses (B)-(D) above as well as other versions of Bold Physical CTT to be found in the literature. Many of these questions are interesting and deserve to be investigated. Nevertheless, they do not properly belong in discussions of CTT, because they are different from the computability question that motivates CTT in the first place.