Board Thread:Consensus Track/@comment-1018594-20150729000741/@comment-1018594-20150906220008

When I say one-shots, I mean things like the Infinite Tsukuyomi that are almost completely unavoidable. That also means that Shisui can't just start the fight with Kotoamatsukami and be done with it.

In the case you provided, should the opponent have no possible defense or counter, then that's it. Someone can have knowledge of what a technique/kekkei genkai is (if they've shown that), but not that specific opponent's usage of it.