This is a helpful book on the topic of presuppositional apologetics: Every Thought Captive by Richard Pratt. I appreciate the following paragraphs that highlight the dilemma of unbelief.
“On the one hand, if the unbeliever claims to have absolute certainty, he can do so only by ignoring his total uncertainty. As illustrated before, certainty is impossible for the non-Christian since he has rejected the only source of true knowledge and is left to finite speculation. For the unbeliever to hold any view tenaciously, he must do so in total disregard of his limited awareness and his rebellion against God.”
“On the other hand, if the unbeliever claims total uncertainty, questioning man’s ability to know, he does so only by ignoring that his view is in reality a statement of absolute certainty. Often this position is presented by the unbeliever as an attempt to avoid arrogance and dogmatism. He may say that we cannot be sure of what we think we know or that we may arrive only at ‘probable knowledge.’ Such a stance may seem less presumptuous on the surface, but it is actually a statement of absolute certainty as well as total uncertainty. Non-Christians who claim total uncertainty for man’s knowledge say, ‘It is absolutely certain that there are no absolute certainties.’ The unbeliever can continue to hold this view only as he ignores how absolutely certain he must be to hold it” (p. 47-48).