three gospels; its weaknesses lie in the exceptions to those patterns, and in the hypothetical nature of its proposed collection of Jesus-sayings. Later scholars have advanced numerous elaborations and variations on the basic hypothesis, and even completely alternative hypotheses that are increasing in popularity. Nevertheless, "the 2SH commands the support of most biblical critics from all continents and denominations."

When Streeter's two additional sources, M and L, are taken into account, this hypothesis is sometimes referred to as