Yes because the paraphrase already exists in plain text somewhere public

28 words would be about 200 characters, though, and I don't think simply existing somewhere in plaintext is enough -- what if I said it is the first 28,000 words of the Latin Bible -- would you still consider that a weak password because it exists in plain text somewhere?

Funny enough, the Bible's well enough indexed, and in small enough chunks, that you could just send someone:

Psalms23:2

and have a 14 word passphrase.