For a skeptic, very little is self evident. All has to be tested. You have made an erroneous conclusion based on threadbare information. Your ship has holes in it, and it is taking on water.
I'll use an analogy to make my point. A man building his house takes extra effort to make sure his foundation is sure, since everything else builds from that. So he'll measure twice, he'll test it twenty ways times Sunday. A sure foundation is a pretty good indication the rest of the building will go well from there.
What if a man erects a foundation with little care? He saw other foundations just like it, and outwardly, his looks the same. He starts to build the rest of his house. He begins to see flaws and cracks, but assumes other causes. He attacks those other causes. He even goes so far as to complain to the local weatherman, since the weatherman's predicted storm destroyed an entire side of his argument. Even with oustanding effort, his house still refuses to stand. Why? The foundation wasn't sure.
The same is for a skeptic's reasoning. It is true that at some point one has to keep building, but for the skeptic, the foundation must be sure first.