Section 13 The juxtaposition rule
Given two maps, derive the map formed by juxtaposing their contents into a single map. The context in which they are valid is the intersection of the contexts in which the original maps were valid.
The next rule says that you can combine separate mini-maps into larger maps and vice-versa. So from this:
and, say, this
you can deduce this (and vice-versa):
13.0.0.1 Interpretation
It seems so trivial it is hard to put into words. In short: you can combine two causal maps into one. If you know that these pink things influence those green things, and you know that these red things influence these blue things, then you know that these pink things influence those green things and that these red things influence these blue things3.
This all gets more interesting when the maps contain one or more common variables. This is the subject of the next set of rules.
though this motivation via knowing about stuff is a cheap sell and not strictly true -– it is a psychological claim and really we are not talking about psychology↩