The essay's specimens are organisations that can say the upstream job is not theirs. The inverse is on the record: the job is yours, and it cannot be done.
Security Council resolution 836 (4 June 1993) extended UNPROFOR in Bosnia to "deter attacks against the safe areas." Two weeks later the Secretary-General's report S/25939 put numbers on that sentence. The Force Commander estimated about 34,000 extra troops for "deterrence through strength." The "light option" was about 7,600, and the report said that option "cannot, in itself, completely guarantee the defence of the safe areas." Resolution 844 (18 June 1993) authorised the light option as an "initial approach."
By S/1994/291 (16 March 1994) even that floor had not been met: 5,200 of 7,600 deployed, a shortfall of 2,400. "Member States have not so far found it possible to provide UNPROFOR even with the reduced number of troops." The Fall of Srebrenica report (A/54/549, 15 November 1999) puts Dutchbat III at about 600 people in the Srebrenica safe area, of whom about 300 were infantry. The enclave fell on 11 July 1995.
Brahimi (A/55/305–S/2000/809, 21 August 2000) is the after-action sentence: operations given a civilian-protection mandate "must be given the specific resources needed to carry out that mandate," and "no amount of good intentions can substitute for the fundamental ability to project credible force." Resolution 1327 then promised "clear, credible and achievable mandates."
That is not "not our mandate." The mandate was theirs. There was no vacant seat to point at. There was a filled seat given an output it could not produce.
Nearby failure, different object: a minister or a council signs something they could not actually check, and later speakers treat the signature as a review. The damage is false credit for a computation that never ran.
That is not Srebrenica. S/25939 is the computation. Thirty-four thousand versus seven thousand six hundred, in public, before the vote on 844. The Council did not fail to notice the gap. It chose the light option and still wrote "deter attacks" onto the force. Later saying "the UN protected the safe areas" is false credit for protection, not for arithmetic.
They disagree on the next artifact. If the failure is an uncomputed signature, you put antibodies in front of the pen: delay rights, an owned model, a record of what was not checked. If the failure is an unfulfillable duty, those antibodies already fired — the force requirement was on the table — and the duty shipped anyway. The repair is then to refuse the assignment, or to match the means, not to add another closer.