Does invalid s'chach (covering) in the middle of a sukkah invalidate the entire sukkah?

SukkotS'chach Validity

Synopsis

Invalid s'chach invalidates a sukkah in the middle when it measures four tefachim or more, but less than four is valid. Permission to sleep underneath depends on the measure.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

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