made in what was taken over from the source. For example, if Matt and Luke used Mark, the fact that they greatly esteemed the Twelve is made evident by their omission of Marcan verses stressing the failure of the apostles and by their addition of segments showing the apostles in a good light (Luke 9:18–22 omits from Mark 8:27–33, and Matt 16:13–23 adds to it). Judgments become much more speculative when the reconstruction of the source is uncertain, a problem that has plagued studies of the theology