I've also reached out to Dr. Ester Salgarella, so I'm familiar with attempts to apply computational analysis to the corpus, and where previous efforts erred.
To illustrate how things can go wrong, let's try to prove that English is a Semitic language. Suppose that the source material we have is this sentence:
"A baker brought a bushel of wheat to the mill."
Now let's match it to Semitic roots as found on this list: https://en.wiktionary.org/wiki/Appendix:Proto-Semitic_stems. Let's look for plausible substitutions now:
- "Baker" matches "bVkVr-", "first-born son". We have our anchor now. (V means any vowel).
- "Brought" looks plausibly close to "burāṯ-", "juniper" on our list. So far so good.
- "Bushel" is a good match with "b-š-l", "to be cooked"!
- "Wheat" does not have an exact match. It could be a loanword, for example.
- "Mill" looks like "m-r-r", "bitterness" if we assume lack of written L/R distinction. Again, juniper + cook + bitter is plausible, because juniper can be bitter.
- The meaning of particles will be inferred from the sentence structure.
Okay, let's take a look at our translation! We have "first-born son", "juniper", "cook", (wheat), "bitter". Pretty clear that (wheat) must be the name of a dish here. Therefore, the sentence can be translated as "A bitter juniper dish is being cooked for a first-born son". This even matches the context: the sentence was found in a granary, and it refers to food.
My point here is that with such a small sample size, we can extrapolate the data to mean absolutely anything. With no reference material, we cannot assess the correctness of any translation.
Speaking of Greek, Linear B and Semitic, the related Cypriot syllabary was deciphered thanks to a bilingual inscription in Phoenician and Greek: https://en.wikipedia.org/wiki/Idalion_bilingual And just as in Crete, there is an undeciphered pre-Greek language written in the same script: https://en.wikipedia.org/wiki/Eteocypriot_language
I'd like to offer some evidence that the people of Crete were of Greek origin and therefore Indo-European rather than semitic, unfortunately all the scholarship I can find on the subject is from Greek scholars and since it confirms that the Minoans are genetically related to modern Greeks, the more I hear of that evidence the less I am convinced by it. Because it's exactly consistent with confirmation bias. So I would not be surprised if the Minoans turned out to be one of the lost tribes of Israel.
Except of course we know those turned up in the America so they can't be the Minoans.
Yeah it's a joke. See https://en.wikipedia.org/wiki/Jewish_Indian_theory
With regard to the origin of the script, Linear A documents have been dated to earlier times than Linear B. And then, there is also an even earlier hieroglyphic script, but its relation to Linear A has not been established.
- The "Libation Formula", which the author used as the base for his translations, is the most studied piece of writing in Linear A, because it's the only recurring phrase (with grammatical variation) that we have. The corpus is extremely fragmentary, with just a handful of instances of longer text (and even then, the texts are the length of an average sentence in English). The majority of documents available to us are lists (of inventory, personnel, offerings or something of this sort). The longer texts make use of punctuation marks, likely put in between words. This gives us a non-trivial vocabulary, which still does not match that of any known language.
- With such fragmentary remaining material, we cannot be sure that a) all the texts we call "Linear A" are written in the same language, and b) the recognizable words are not abbreviations, for example.
- The author made an assumption that Linear A symbols which have counterparts in Linear B should have the same phonetic values. This gives us an already known glyph that represented "NA". "Duplicate" glyphs are only found in the P-series, and are assumed to represent syllables which were distinguished by the Linear A language, but not by Greek - such as aspirated/unaspirated P. There is a glyph that stands for "NWA" in Linear B, but instances of it have been found in Linear A as well.
- There are countless words with no known etymology in Ancient Greek, assumed to originate from a substrate language or languages spoken in the area at the time Greeks migrated to their present-day homeland. The language of Linear A would be a likely candidate for such substrate. If Linear A were a Semitic language, then we should already be able to establish Semitic etymologies for those words as they were in Greek. Of course it could also be the case that these words came from an another language which did not adopt writing or its writing did not survive to our times.