What is the Source Hebrew and Greek text used in the KJV 1900 reverse interlinear?
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This sort of info can be found in the book's info panel. Here is what is listed:
Bama's answer is specific.
A more general answer, should it be helpful, is the KJV and NKJV use the TR as a base text for the NT, while most other English translations use one of the eclectic texts (primarily NA(now 28) or UBS (now 5)). I do not believe any modern English translations go with the majority text, but may be mistaken.
Both UBS and NA will incorporate the CBGM method in their next edition. I expect a UBS 6 in the next year or two (as soon as John is completed), and NA29 a couple years after that.
Coherence-Based Genealogical Method has been defined as "a new set of computer-based tools for studying a new set of text-critical evidence based on a new principle for relating texts". Which is a refinement of 'eclectic' or 'critical'.
That's a pretty good start, and if you want a little more detail there's a very good resource already in Logos...Wasserman and Gurry's 'New Approach' book.
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