In the 19th century, however, scholars began to question whether this tradition actually refers to those texts, especially in the case of what Papias ascribes to Matthew. In 1832, Schleiermacher, believing Papias to be writing before these Gospels were regarded as inspired Scripture and before the formation of any New Testament canon, argued that "logia" could not be understood in its usual sense but must rather be interpreted as "utterances" ('), and that Papias was referring to collections of the sayings of Jesus. Soon afterwards, a new theory of the Synoptic problem emerged, the two-source hypothesis, positing that the double tradition in Matthew and Luke derived from a lost document containing mostly sayings of Jesus. Holtzmann's defense of this theory, which has dominated scholarship ever since, seized upon Schleiermacher's thesis and argued that Papias was attesting a ' ("logia"-source), which he designated "Λ" (lambda). When later scholars abandoned the evidence of Papias as an argument, this hypothetical source came to be more neutrally designated as "Q" (for ""), but the reinterpretation of the word "logia" already had firmly taken hold in scholarship.