A Response to Skepticism

A skeptic is someone who doubts man's ability to know things. Skepticism can help one become more discerning and less gullible, so it is healthy in small doses. It becomes dangerous when one begins to say that "you can't know anything for sure." This total skepticism is impossible because it rejects the possibility of knowing anything, including knowing that we can't know anything. If we can't really know things, then we would not be able to reasonably doubt anything, either. A skeptic obviously doubts.
One motivation for skepticism is that people are sometimes wrong or they often make mistakes. Just because it's possible that humans can be wrong about things doesn't automatically make them wrong. Skeptics may observe that humans make a lot of mistakes and try to use that as an argument for their skepticism. But in order for them to know that people make mistakes there must be knowledge.
It would seem, then, that skeptics are unable to present any concrete arguments because they try to assert a view which would require presupposing knowledge. Therefore we may conclude that we can indeed know things.