Question: How do you Presuppositional Apologetics respond to this question about certainty in knowledge?

Someone asked: It seems like some of the lower level Presupps here think that the atheist cannot Know anything with absolute certainty. I don’t think that is true at all. I cannot Know something if I do not believe something. To Know something for this example at least, simply means to have a justified true […]
Question: How do you Presuppositional Apologetics respond to this question about certainty in knowledge?