I have a question. Is a {sei} bridi in a bridi called an embedded bridi? For example,
1) ko'a ko'e sei nei brode se'u broda
2) ko'a ko'e sei no'a brode se'u broda
In which sentence is {broda} repeated, or neither?
On the other hand, I think a {to} sentence in a bridi is neither an embedded sentence nor a part of the bridi in this context. For example,
3) ko'a ko'e to nei brode toi broda
4) ko'a ko'e to no'a brode toi broda
in neither 3) nor 4), {broda} is repeated; or am I wrong?
A {sei} bridi is grammatically a free modifier just like a {to} sentence, but semantically a metalinguistic bridi, which is somehow similar in meaning to {BAI lonu} bridi, which is clearly an embedded bridi, in which {no'a} works.
I can only answer to the last sentence.
in {broda fi'o brode lo nu brodi} broda is actually embedded inside *brode*. As it's roughly expanded into
{lo nu broda cu se brode lo nu brodi}.