Interesting terms. I've never came across them in my linguistic study, but I see they were heavily employed by C.F. Hockett, so that might be less exposure to A

Interesting terms. I've never came across them in my linguistic study, but I see they were heavily employed by C.F. Hockett, so that might be less exposure to American Structuralism. I want to make a small correction here. Israel is a special case not because all regional dialects are mutually intelligible, but because it has no regional dialects at all (unless you're talking about Arabic, but then it's a far cry from an L-Simplex). This is due to the history of Modern Hebrew in Israel being relatively recent. It only reached a stable grammar with a sizable generation of native speakers in the 1920s and 30s, and until the 60s at least non-native speakers probably outnumbered the native speakers. By then Television was unleashed, and killed whatever budding dialects that existed. Practically speaking, there used to few minor dialectal variations in Jerusalem. It pretty much amounted to about 20-30 words, a default feminine form for the noun 'cat' and a different pronunciation for the number 200. But even these features are barely left in Jerusalem, which had seen large population exchanges.