What is an assumption that the mind makes in order to have a "location" for its perceptions of the primary qualities?
The basic assumption is that its perspective is the best interpretation of reality.
This is a form of "Indirect Realism":
The immediate objects of perception are mind-dependent
objects that are caused by and represent the mind-
- There IS a distinction between primary and secondary qualities.
- Sense-data represent the objects in the world around us.
- Never have a 'direct' awareness of these objects -- this
accounts for illusions and differences in perspective.