As noted above, rehearsing all the evidence against your position alongside your own should be a counter. As in the article’s example, the math should not be “1 vs 3 every time”, but it should not be “1 vs 3 the first time, 1 vs 0 the second and subsequent times” either. It should be “1 vs 3, then 2 vs 3, then...”
In actual debate practice, it might confuse the other person that you’re listing their points for them, but I’ve found it a helpful practice anyway.
As noted above, rehearsing all the evidence against your position alongside your own should be a counter. As in the article’s example, the math should not be “1 vs 3 every time”, but it should not be “1 vs 3 the first time, 1 vs 0 the second and subsequent times” either. It should be “1 vs 3, then 2 vs 3, then...”
In actual debate practice, it might confuse the other person that you’re listing their points for them, but I’ve found it a helpful practice anyway.