Howl wrote: ↑Thu Sep 20, 2018 2:56 pmAnd if you read the introduction of NIL you would know that it is far from comprehensive.
In other words, there are serious gaps in the data set you are using. Which simply means that you can't draw any conclusions from the absence of anything in your data set.
No, statistical discrepancies can be used to draw conclusions just fine (they're not the exact same thing as "gaps"). Think of the LIV+NIL data as an available set of measurements: they're not perfectly comprehensive, but they don't need to be, they only need to be representative.
Adding in all nominalizations not in NIL probably would add e.g. a few more examples of *g in Anatolian; but, then, it would surely also add more examples of *ǵ, and we'd be still in a situation where *g is not just rarer than *ǵ, but also even more rarely distributed. The latter is the key fact: a priori we don't expect words/roots with rare phonemes (e.g. *g) to be any less likely to be reflected in daughter languages. If there are, say, 120 reconstructions with palatovelars and 40 of these have reflexes in a daughter language group, then given 30 reconstructions of plain velars, we'd still expect to see about 10 reflexes, not a mere 2-3.
KathTheDragon wrote: ↑Thu Sep 20, 2018 10:29 amWhy is it important to look at widely-attested cases?
Because word survival is not
completely random: core vocabulary changes slower. You can also do the Swadesh route and pre-define a list of core vocabulary, but I would lean towards the real width of attestation and use that to define what's the core vocabulary specifically in IE. (There is a cultural aspect: "cow" is core vocabulary in IE, "arrow" is core vocabulary in Uralic, the inverse does not hold.) In either case, it will be reasonable to assume that this core vocabulary is also likely to be old within the pre-PIE period. Therefore all statistical internal reconstruction is better based on such data, not on the whole comparative material, which is otherwise bound to include also recent and even post-proto-language innovations.
KathTheDragon wrote: ↑Thu Sep 20, 2018 10:29 amFor example, *ḱenk- "hang" is only in Germanic, Latin, Sanskrit, and Hittite, but its stem-final velar can't be secondary, nor does pre-PIE loaning seem particularly likely.
"Can't" is a bit strong: I could e.g. suggest that actually original *Ḱ… Ḱ dissimilates in satem languages, giving *ć…k rather than *ć…ć.
Or maybe more profitably, that *-k- is a root extension: it's one of the more common extensions even in attested cases, and *-RK- roots are actually more common overall than *-RḰ- roots (*-Rk- 43, *-Rg- 29, *-Rgʰ- 18; *-Rḱ- 22, *-Rǵ- 12, *-Rǵʰ- 18, *-Rḱ-). (Though this could also mean that there has been some kind of a root-final neutralization process involved.)