I find I really like the labels &quot;the special idea&quot;, and &quot;the big idea.&quot; I like it because it introduces the nature of the theory quite approachably, where a theory is at it&#x27;s heart an idea or a concept. Then, by labeling one &quot;special&quot; and on &quot;big&quot;, the relationship between the two is immediately obvious; we see that one idea is covering a smaller but more particular area, while the other idea covers a larger but potentially less-special and more general area.<p>The piece isn&#x27;t as &quot;strictly accurate&quot; as it could be, but that&#x27;s the point. By making something approachable you&#x27;ll hook into many more minds than otherwise, and the knowledge of the reader that &quot;this is not all, there is more to learn&quot; is powerful bait for the curious.