What if the Kohen sees a piece of healthy flesh in the Nega without two white hairs?
If there is healthy flesh in a Baheres, what is the law?
Having taught the law of two white hairs regarding Baheres, why does the Torah repeat it by Se'es?
Ramban #1: To teach us that they are a Siman Tum'ah in both cases.
Ramban #2 (citing Toras Kohanim): To learn from it that the Shi'ur Michyah is sufficiently large to contain two hairs.
QUESTIONS ON RASHI
Rashi writes that healthy flesh in the Nega without two white hairs is a Siman Tum'ah. What is his source?
Ramban: Pasuk 3 said that two white hairs by themselves are a Siman Tum'ah in a Baheres (and the same applies to a Se'es. If so, Michyah must be a Siman Tum'ah by itself.)
Hadar Zekenim (11), Da'as Zekenim (11, both citing Toras Kohanim): "[Tzara'as Noshenes] Hi" (verse 11) teaches that Michyah is Metamei even if it preceded the Baheres.