What did William R Farmer disagree with?

Answer 1

Until his death, William R. Farmer was the leading advocate of the Two Gospel (neo-Griesbach) Hypothesis, i. e. the view that Matthew wrote the first of the canonical gospels; Luke made use of Matthew and other source material in producing the second, now canonical, gospel; and Mark conflated Matthew and Luke in writing the third of the canonical gospels.

William R. Farmer then disagreed with other synoptic source hypothesis, particularly, with the Two Document hypothesis, which claims that Mark wrote the first gospel and Matthew and Luke made independent use of Mark and hypothetical source, originally simply called Q (short for the German word for "source" Quelle, but which now more popularly carries the title, "The Sayings Gospel, Q."