Repeatable
A CWE mapping is regarded as repeatable if multiple people with equivalent technical expertise assign the same CWE identifier to a security issue.
The 7PK paper does not state whether repeatability of mappings is a goal. It probably isn't, since the focus is more on education of developers and automated detection.
For CWE, regardless of the view, the requirements for repeatability are different. Since CWE is intended to facilitate communication of weakness information between diverse communities and tools, repeatability is important - people have to be able to map to the same identifier.