>>Evaluate whether the information is complete and gather any missing facts. Determine if the information is consistent; recognize contradictory statements and statements you know not to be true<<
How is that even a tiny bit different from what you have to do with ANY other issue? Compare it to Circular 230 Section 10.34 Standards with Respect to Tax Returns, "The practitioner may not, however, ignore the implications of information furnished to, or actually known by, the practitioner, and must make reasonable inquiries if the information as furnished appears to be incorrect, inconsistent with an important fact or another factual assumption, or incomplete."
In other words, tax preparation is a professional activity, not simply a clerical function of filling in forms.