Jot and Tittle are Myths because they are from the Latin text, not the Greek.

Matthew 5:18. For verily I say unto you, one Jot or one Tittle shall in no wise pass from the law, till all be fulfilled. KJV

Jot is the Latin letter equivalent to the Hebrew Yod, and the Greek Iota, so the letter was simply not translated. Tittle is said to represent decoration on the letters, but there is no decoration on the ancient Greek texts.