I remember reading that somewhere (probably 4chan) figured out a somewhat high accuracy way to tell which was the control and which was the variable, and started spam solving them by correctly doing the assumed control but putting the same thing (knowing 4chan, probably a slur) for the assumed variable until the system got enough confirmation to move the word to the control rotation and started accepting the word for that. Can’t remember where so it may be unconfirmed
I remember reading that somewhere (probably 4chan) figured out a somewhat high accuracy way to tell which was the control and which was the variable, and started spam solving them by correctly doing the assumed control but putting the same thing (knowing 4chan, probably a slur) for the assumed variable until the system got enough confirmation to move the word to the control rotation and started accepting the word for that. Can’t remember where so it may be unconfirmed
Unfortunately I was hooked on 4chan around the time. They called it “n… the captcha”.