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No, most Pharisees were scribes, but not all, and not all scribes were Pharisees; some were Sadducees—but since Pharisees were known for pursuing understanding and being devoted to the law, it makes sense that some sought to settle the question of Jesus’ authority.
No, while the vast majority of Pharisees were scribes, not all of them were. At the same time not all scribes were Pharisees, as there were also scribes that were Sadducees. The Pharisees, however, were renowned for their commitment to understanding and devotion to strictly observing the law. It is therefore understandable that some of them would be eager to see the question of Jesus’ authority settled once and for all.1
38 Then some of the scribes and Pharisees answered him, saying, “Teacher, we wish to see a sign from you.”