Rav Huna challenges Rav about whether salt is required for the grain-offering, even though it isn't presented in the Torah with double-language (as other requirements are). Which opens the discussion of the salt in new ways. Also, the Torah verse about salt and the grain-offering makes it clear that salt is essential to the offering. In contrast, in the case of the grain-offering, to the blood on the altar. Plus, a mnemonic to help remember the factors that would nonetheless require salt.