You know, looking back at that post I can't believe almost a whole year has passed already...
Oh btw, I just realized you're right, you could technically stab the apples (or the people) because it said "only one stroke of the knife" and stabbing isn't a stroke, so I guess you could stab with the knife an infinite number of times.
Both of you failed, you have to solve it with one STROKE of the knife, and stabbing isn't a stroke, so the answer is clearly to slit both of their throats with a single stroke of the knife 😁🔪
... But does only one stroke mean one stroke plus an infinite number of stabs, or just one stroke and no stabs..?
Oh btw, I just realized you're right, you could technically stab the apples (or the people) because it said "only one stroke of the knife" and stabbing isn't a stroke, so I guess you could stab with the knife an infinite number of times.