How do you know it wasn’t a deliberate lie? Why give such details until you’re 100% sure they’re true if they have any concern for their credibility? I’m amused to see that with the two-plus-year history we have suffering the propaganda from this White House that anyone would give them the benefit of the doubt.
I am sure you agree, combat operations are quick, violent and confusing. Figuring out what happened, when and how and in what sequence, is not easy. In fact, to do so within hours is downright impossible. Combat veterans here on FR will agree.
The briefer should respond to questions with: “At this time, we understand. . . “ or “Initial reports are. . .” The fact that they do not include those qualifiers indicates they are incompetent, not liars.