7.
The First Discourse on the Course of Expression
217.
...Etc. claims to have seen what has not been seen, claims to have heard what has not been heard, claims to have sensed what has not been sensed, claims to have cognised what has not been cognised... etc.
He claims not to have seen what has not been seen, claims not to have heard what has not been heard, claims not to have sensed what has not been sensed, claims not to have cognised what has not been cognised.
The seventh.