KeyStone
← All articles

Phrase · Illegible handwriting

My handwriting is illegible: a/o, u/v, n/m… how the doubts are resolved

You wrote the phrase by hand years ago, in a hurry, and now you can’t tell whether that letter is an a or an o. It is one of the most common situations and also one of the best-ending ones, because the word list was designed precisely so these doubts resolve themselves.

October 2, 2026 · 4-minute read

Why there is almost always only one valid reading

The 2048 possible words were chosen not to resemble each other. If you are unsure between two letters, normally only one of the two readings exists in the list, and the other simply isn’t a valid word. The doubt dissolves without any guessing.

And when both readings exist — it happens, though it isn’t the norm — you have two candidate phrases, not a problem. Two are tested in a second. Even with five or six such doubts spread across the sheet, the number of combinations is still trivial for a computer.

What to do with the paper

  1. Don’t rewrite it «neatly». Copying it out cleanly is where the irreversible mistakes happen.
  2. Don’t trace over the letters with a pen to make them clearer: if you get one wrong, you destroy the original.
  3. On a separate sheet, note the doubts as they are: «position 7: could be a or o», without deciding.
  4. Store the paper flat, in an envelope, away from light and damp.
If the ink has faded badly, looking at the paper with raking light from one side — a torch almost parallel to the sheet — reveals the pen’s groove and often settles the doubt better than any software. It is an archival trick, not a computing one, and it works.

The most frequent confusions

Typical doubtsWhat usually happens
a / oAlmost always only one reading exists
u / vSame; resolved instantly
n / mThere may be two valid words: two attempts
i / l / 1There are no digits in the list: it is always a letter
rn / mThe classic small-handwriting confusion
A word cut by the paper’s foldThe first 4 letters are usually enough

That last row is worth underlining: each word on the list is determined by its first four letters. If all you can read of a word is «abst», you already know which one it is. That saves a great many half-ruined sheets.

Keep reading