B
Five images: the same swollen letterforms as Four — e a B n o — from perfectly legible to maximally destroyed. A different machine was shown each one, twenty times over, and asked to transcribe any text it could see. Shown an unrelated image instead, it correctly reports it can't read any text. Shown this row of five letters, at any stroke width, including the one where all five are perfectly legible, it reports exactly one of them.
Below is every reply, unedited, grouped by image. There are 100. They are all the same word.

stroke 0 · 20 readings
B B B B B B B B B B B B B B B B B B B B

stroke 30 · 20 readings
B B B B B B B B B B B B B B B B B B B B

stroke 42 · 20 readings
B B B B B B B B B B B B B B B B B B B B

stroke 54 · 20 readings
B B B B B B B B B B B B B B B B B B B B

stroke 66 · 20 readings
B B B B B B B B B B B B B B B B B B B B