The UK Maritime Trade Operations Centre confirmed Monday that a vessel was struck by unknown projectiles in the Strait of Hormuz, hours after President Trump announced the U.S. would begin guiding ships through the waterway with military support. The word “unknown” is doing significant work in that sentence. In a strait where Iranian forces have been operating against commercial shipping, where the U.S. military has active minesweeping operations underway, and where the IRGC has demonstrated both the capability and the willingness to attack vessels under ambiguous conditions, “unknown” does not mean the intelligence community has no candidates. It means the attribution has not reached the threshold for public declaration.