The phrase "two sentences mentioned in the postscript,": which is correct? in, on , or at?
ANSWER:
"on the postscript" : on is a prepositional function word indicating the position of the PS; the PS is actually on the paper of the letter. The PS is not on a separate piece of paper attached to the letter, like a post-it note, in which case you could say "on the postscript."
"at the postscript" : at is also a prepositional function word, but indicates the location of the PS; the PS is actually added below the signature line of the completed letter, in which case if one did not know where to look for the two mentioned sentences, then you could say "at the postscript."
"in the postscript" : in is also a prepositional function word, which connotates correctly where the sentences are. They are not in the body of the completed letter, and, one knows where a postscript is added, and, one knows the postscript is on the stationery of the letter.
I hope this supplementary information serves you well. "Ambiguous Bill"
