What are the identifying features to help us know to what Paul refers? Myths are endless and speculative, while genealogies are concrete (one cannot change their parents). Therefore, it must involve some type of speculative offspring in a genealogical sections of the bible. It’s clear that Paul is speaking about Jewish false teachers who spread these speculations since Paul uses the term “Law” three times in vss. 7-9.
1 Chronicles 1-9 has the most extensive list of chronolgy in the Hebrew bible. Again, these are the unchanging records of descent, and therefore, concrete. A genealogical record removes all controversy, speculation, and myth. Is there another genealogical section in the bible where there may be some hard-to-understand terms or references?
Genesis 4-6, with the judgment and its rationale in 6.1-4, is the section of scripture that records the first human genealogies. This section also has a strange term and may be hard to understand exactly to what the references are pointing.
A well-known breeding technique that produces bigger offspring in plants and animals is hybridization. The method involves using two or more disparate lines and then crossing them to realize larger and vigorous offspring. This is what seems to me what happened with the humans in Gen. 6.4 in the resultant “heros” and “warriors.” I believe it is this reference (Gen. 6.1-4), to which Paul warns Timothy to not devote any time toward its speculative aspects.

