We read what we suppose exists

Interesting the information a graphologist can glean from handwriting!
Reminder to self. Do not leave notebooks lying around.
Anyway, peering at a copy of the infamous Goulston Street script. It doesn't say men. It reads : may.

That is a, Y.
Which proves we read what we suppose exists.

The From Hell letter and an archetypal serial killer's handwriting. At least this is how I would imagine a murderer would write. The length of the lower zone's Y on the word bloody is extraordinary and the loop is formed in reverse.