To answer this question, scholars have to ask who wrote the gospels, when they wrote them, what was their objective in writing them, what sources the authors used, how reliable these sources were, and how far removed in time the sources were from the stories they narrate, or if they were altered later.
Untuk menjawab pertanyaan ini, para sarjana harus bertanya siapa yang menulis Injil, kapan mereka menulis, apa tujuan mereka dalam menulis, apa sumber-sumber yang digunakan penulis, seberapa dapat diandalkan sumber-sumber ini, dan seberapa jauh waktunya dari sumber asal dari cerita-cerita mereka, atau jika mereka diubah nanti.