Is a naturally occurring lechi valid when it protrudes four cubits into the alleyway?

Synopsis

A naturally occurring lechi that protrudes four cubits into the alleyway loses its status as a lechi and is treated as an alleyway wall, requiring a separate lechi. However, if it was explicitly placed as a lechi, it remains valid even at four cubits.

Early Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

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