Gospel of Peter to be the work of the Apostle Peter: However, scholars generally agree that Gospel of Peter is pseudepigraphical (bearing the name of an author who did not actually compose the text). The true author of the gospel remains a mystery. Although there are parallels with the three Synoptic Gospels, Peter does not use any of the material unique to Matthew or unique to Luke. Raymond E. Brown and others find that the author may have been acquainted with the synoptic gospels and even with the Gospel of John; Brown ("The Death of the Messiah") even suggests that the author's source
That that is is that that is not is not is that it it is was noted in "Brewer's Dictionary of Phrase and Fable". This phrase appeared in the 1968 American movie "Charly", written to demonstrate punctuation to the main character Charly's teacher, in a scene to demonstrate that the surgical operation to make the character smarter had succeeded. That that is is that that is not is not is that it it is That that is is that that is not is not is that it it is is an English word sequence demonstrating syntactic ambiguity. It is used as an example illustrating the importance of proper punctuation. The sequence can be understood as