The Evolution
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treated as one word. And lastly, once someone is told that Florida eggs
intersects "orange juice," that person will then have a link running
from the phrase Florida eggs taken as a single whole to "orange juice."
Accordingly, for that person the phrase Florida eggs would readily yield
"orange juice," but not by Type III intersection; instead it would do it
by the whole-to-whole link that runs directly between the two.
Whenever two or more words act as a single whole in yielding a
concept a Type IV interaction will be said to be at work. Naturally any
familiar phrase sets up a potential for Type IV processing, as any group
of words, if it is short enough and familiar enough, may be treated as a
single word.
The Requirement of Contiguous Occurrence
It is interesting to note that for A and B to yield a concept Z by
either a Type I or Type II intersection, or by a Type IV interaction, it
is necessary for A, B, and Z on some prior occasion to have occurred all
three together in memory.
In other words, if in a particular memory A, B, and Z have not
occurred together, then there is no way there can exist in memory an
entity Z that contains—i.e. has part-whole links with—both A and B,
and so a Type I intersection of Z is an impossibility (to see this
example clearly, imagine A as "yellowness," B as "brightness," and Z as
"sun"; for "yellowness" (A) and "brightness" (B) to be established in
memory as part of the particular image "sun" (Z) requires that at some
time all three occur together).