No, though admittedly it is sometimes a tough line to draw. Its like Justice Potter said about obscenity -- you know it when you see it. And so for example when you take the totality of what Trump said leading up to and on 1/6, combined with his inaction as it occurred, you can say he is responsible for the violence despite having "skated the line" trying not to be too obvious about it.
Similar to his comments I posted above regarding Pelosi incident. Strongly insinuating its true without asserting it, specifically.
At some point you have to take a step back and ask about all the facts and circumstances to try to draw a conclusion as to what the intent is -- is the speaker intending to, for example, encourage violence? Or in the most recent case is he, based on all the circumstances, backing a baseless conspiracy theory in an effort to undermine the real story -- political violence -- and to disclaim any responsibility for doing so?
The right wingers can debate here all they want a bunch of word-for-word hair splitting on this. But in doing so all they do is enable Trump's weak rhetorical tactic of implying, but not outright saying. When all the while, based on all the circumstances, everyone knows exactly what he's saying, exactly what he's promoting. Either now, or on 1/6.