Bound the alternatives claim to one read, and point the grammar at it

CHANGELOG.md

@@ -18,9 +18,9 @@ replacement, and each removed path, column or flag.
   `parent`, a name repeating inside one parent row, a name spelling another row's key, a table named like a column of any
   table above it, a table whose format or cell references its own family, and,
   within one render and draw group, a path drawing a table another path selects a
-  row of, or two paths pinning different rows of one table. A read inside a cell is
-  weighed against another only where both rows can render together, which two rows of
-  one table, or rows under two different rows of an ancestor a path pinned, never can.
+  row of, or two paths pinning different rows of one table. Two cells are weighed
+  against each other only where they can render together: not two rows of one table, and
+  not rows under different rows of a table a path pinned.
 - `New` refuses a root choice of templates sharing one format and one set of string
   fields, naming the rows TSV to write instead.
 - `misc.territory`, `misc.currency`, `misc.language`, `misc.httpstatus` and

README.md

@@ -546,7 +546,8 @@ to, a chain of parents that closes, a table named like a column of any table abo
 it, and a cell or format of a table that references a table of its own family, through
 any template, a `repeat` or a `drawGroup` included, since a row rendered whole would
 draw the family apart from itself: read the family from a template beside it, or add
-the value as a column.
+the value as a column. Which reads a render must reconcile, a cell's included, is
+under [Decisions](#decisions).
 
 ### Options and fields
 
@@ -1106,10 +1107,10 @@ the Development section below, and who ships a register the four above then draw
 - **A table read into is pinned; a table read whole draws afresh.** A path into a
   table pins its row, and the ancestor rows it links to, for the render and group, as a
   reference path pins its level, and a bare `{/city}` draws a row each time and pins no
-  row of its family, as a bare reference does; so a bare table
-  beside a path into its family is refused like a bare reference beside a path into
-  it. A bare table reference still counts as a read for a `drawGroup`, since the group
-  is what draws it apart from the family's pins.
+  row of its family, as a bare reference does; so a bare table beside a path into its
+  family is refused like a bare reference beside a path into it. A bare table reference
+  still counts as a read for a `drawGroup`, since the group is what draws it apart from
+  the family's pins.
 - **Every reference path into one family selects the same rows, per render and
   group.** A selector pins rows for the render, and a read that draws freely before it
   could pin a row the selector contradicts, so accepting both would make the result
@@ -1138,14 +1139,13 @@ the Development section below, and who ships a register the four above then draw
   format and options, at the cost of holding the rows twice, which is what a
   category over a register with two natural formats asks for; a TSV nothing names
   stays a load error, since that one is a file forgotten rather than shared.
-- **The rows of a table are alternatives.** Only one row renders, so a cell in one
-  row and a cell in another never meet, and each may select its own row of another
-  table; the cells of one row, and whatever they reach, do meet, and so does the
-  format beside them. The rule the fence applies is that two reads meet unless they sit
-  in rows that never render together: two rows of one table, or rows under two different
-  rows of an ancestor a path pinned. A
-  choice's items get no such treatment yet: two items selecting different rows
-  are still refused.
+- **The rows of a table are alternatives.** Only one row renders per read, so within one
+  read a cell in one row and a cell in another never meet, and each may select its own
+  row of another table; the cells of one row, and whatever they reach, do meet, and so
+  does the format beside them. The rule the fence applies is that two reads meet unless
+  they sit in rows that never render together: rows falling under different rows of a
+  table a path pinned, two rows of that table itself included. A choice's items get no
+  such treatment yet: two items selecting different rows are still refused.
 - **A table never reaches its own family, by any route.** A `repeat` iteration and a
   `drawGroup` each draw apart on purpose, but a row that lists three localities from
   other regions is the output the family exists to prevent, so the own-family fence

todo.md

@@ -158,11 +158,13 @@ by a `data-import/` script, as README goal 12 asks.
   at New" where the two draws land on rows whose cells select different rows of another
   table, and `{/geo.SE.locality}|{/geo.SE.municipality}` renders a locality outside the
   municipality beside it. Each read draws its own row, so cells of two rows render
-  together, where the fence counts them alternatives and compares neither.
-- Name the cell a refused read sits in: where both reads come from TSV cells the overlap
-  error says `{area} with {/addr} renders a level that {where} with {/addr.city} reads a
-  path into`, naming neither table, row nor column, so the author greps a register-sized
-  file — and "name the fields you want instead" rewrites a cell that is not the one to fix.
+  together, where the fence counts them alternatives and compares neither. Have the error
+  name the path spelling that holds, `{/geo.SE.locality.name}|{/geo.SE.municipality.name}`,
+  as the README's rule on a rejected spelling asks.
+- Name the row a refused read sits in: where both reads come from TSV cells the overlap
+  error names the category and the two columns but no row, so the author greps a
+  register-sized file for the cell — and "name the fields you want instead" rewrites a
+  cell that is not the one to fix.
 - Stop the family fence naming a rewrite that cannot work: where the drawn table's rows
   select more than one row of the family, every `write {/terr[NO].name}` it offers fails
   the same way, and only the `drawGroup` it also names is left.
@@ -184,6 +186,9 @@ by a `data-import/` script, as README goal 12 asks.
 
 ### Open questions to settle
 
+- Decide whether a goal 5 violation joins the comprehension gate's exception list, beside
+  a security fix and a dependency bump: the panic above waits behind the whole round at
+  5.9, and `{/geo.SE.locality}|{/geo.SE.municipality}` mispairs the shipped data meanwhile.
 - Decide whether the README's Audience names the author who writes categories under
   `--data-path`: the four personas listed consume the shipped set and the contributor
   ships a register upstream, while "Your own data" is a README section, `-d` is a