Editing Openai/69186d20-2d14-8013-b9c6-c09000f173f6 (section)

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c a i f e → /ˈkafʲə/
* c: - nearest vowel on right: a (immediately next) → broad. - (i is further away and really grouped as [ai] with the vowel of the syllable.)
* f: - nearest left vowel: i (one step left) – slender - nearest right vowel: e (one step right) – slender → no conflict; f is slender.

So there’s no true mixed case for any single consonant here.

===== b a i n n e → /ˈbˠanʲə/ =====
* b: nearest vowel left/right is a → broad.
* n (first): nearest vowels are i left (slender), e right (slender) → slender.
* n (second): nearest left i or e (depending how you syllabify bain-ne) → still slender.

Again, no “one side broad, one side slender” for the same consonant.

===== m a i t h → /mˠah/ =====
* m: nearest vowel is a → broad.
* t (underlying, before lenition): nearest left vowel i and right none (th is one unit, no vowel after) → slender.

Still no real mixed.

===== t a e → /t̪ˠeː/ =====
* Digraph ae spells /eː/.
* For t, nearest vowel letter on the right is a (broad) – even though the sound is [eː].
* So orthographically t is broad, because its “class vowel” is a.

This is the kind of thing that looks like “mixed” at the level of phonetics, but at the level of spelling it’s coherent:
* the a in ae “belongs” to the left side and is broad;
* the e “belongs” to the right side and is slender;
* but for t we only care about the a side.