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one fable-low hijack cell

pair immutable / mutable envelope en_pipe ordering AB effort low

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# Mutable vs Immutable

## Core Difference

| | **Mutable** | **Immutable** |
|---|---|---|
| **Definition** | Can be changed after creation | Cannot be changed after creation |
| **Modification** | I

neighbors

ordering BA envelope code_caret (AB)envelope code_haskell_alt (AB)envelope code_pipe_pipe (AB)envelope en_arrow (AB)envelope en_bare_or (AB)envelope en_bare_or_q (AB)envelope en_vs (AB)envelope en_vs_q (AB)anchor view all 60 cells across efforts × anchors