Based on Rev. 2:8, Kermit Titrud offers the following "modification" to the
Granville Sharp rule:
"If two substantives are connected by KAI and both have an article, they refer to two different persons or things unless the immediate or even broader context strongly suggests that they refer to the same person or thing [Rev. 2:8; 2:26]. In this case, we are to understand that different aspects of that which is being described are being stressed. If the first substantive has an article and the second does not, the second refers to the same person or thing as the first unless the context suggests otherwise. In this case, we should understand that they are being considered as a unit in some sense. (This could also be applied to a series of three or more.)" (Titrud's article is found in D.A. Black's (Ed.) Linguistics and NT Interpretation pp. 249-250).
Although he modifies Sharp's rule thus, Titrud still believes that 2 Pet. 1:1 identifies Jesus as God (even though the context suggests otherwise!). Interesting indeed.