You say it’s one person with a knife. Ok. What person? Are we talking crack addict, vengeful ex-girlfriend, mafia goon, terrorist, pissed-off neighbor, anti-actualist radical activist? Are we talking somewhat reasonable person or psych ward? Are we talking ex-spetsnaz or soccer mom? Can the situation be defused without a fight? How would a fight likely go? I could go on for pages… What’s the room configuration, how far am I, how sharp is that knife, is it double bladed or can I somehow grab it if necessary, is the floor slippery, are there objects around that might help… I could go on for pages and the hypothetical scenario would not even remotely approach the actual situation.
But that’s not the answer you want. You want, out of this pretty barebones hypothetical scenario of yours, an answer on principle. Something like: this is what I’d do in this situation and every situation related to it. Which is precisely what I described in that post above, what feeling-beings do when they make hypotheticals. And then… they actually do whatever. Because I can picture many scenarios in which a random feeling-being, in the situation above, and despite having made the firm and constant decision in their hypothetical scenario that “I’d jump on the aggressor without any consideration for anything, to give my life away for my child, because that’s the right thing to do”, would actually freeze, or collapse on the floor, or be terrified for their own life, or start making grim scenarios about what will happen after the whole thing is over, or prioritize saying goodbye to their kid, or do some crazy thing like putting a knife to their own throat in some weird threat, etc. All behaviors that presumably would not resolve the situation because they’re actually not taking the facts of it into consideration, only the overwhelming feelings that are being had at the time.
What actual freedom does in that regards, is free up native intelligence, and allow it to come to most sensible decision possible according to the available facts of the situation at hand, in the moment, and as such provide the best probabibility of seeing the said situation resolve for the best.