"Note the use of the word "feel" opposed to "know" or "claim"."
Where? You just assume that? Units feeling doesn't matter anyway, what came next should be analyzed. Unit doesn't point that his feelings about the next statement should be the object of discussion.
"Note the request for retorts. Something that is only done by those that are not ignoring the possibility of error."
It can be a just a polite gesture or whatever. It can be also a task thrown on us - like "do you see a paradox here?" Shouldn't concentrate on people and their possible state of mind but only look at the statement that was presented us as a task.
"Note that the discussion continues to talk about doubt and skepticism. It should be assumed that someone that is skeptical would be skeptical about skepticism."
Doesn't matter how it continues. The problematic statement was already thrown up. Skeptics are usually skeptical about skepticism? What makes them skeptics then? How they differ from non-skeptics that are skeptical about skepticism?
"Believing absolutely (aka not considering the possibility of error) is neither nonsense nor a contradiction. It describes ignoring the possibility of error. This is possible to do. Since it is possible to do, a term describing it is no nonsense. Even if you don't ignore the possibility for error there exist those that do. In fact there are those that take pride in ignoring doubt even when faced with evidence. It can be misused to label those that do not ignore the possibility of error as fools. However all terms can be misapplied so the possibility of misapplication is not a legitimate critique. You claim that it is only used as Ad Hominem. This is not so. I have been using the term yet have not yet labeled anyone with it. Obviously it has a use beyond calling people fools."
Something that I wanted to add and why I started this post: Yes, it is possible to ignore the possibility of error, but only then if you are aware of that possibility of error. Then you can forget about it for a while. If you don't know that there is a possibility of error, then you can't ignore it. Now, usually I can believe in something (know the possibility of error) and know something (don't know the possibility of error, I hold that my belief is quite necessarily true). "Absolute belief" is something I don't meet in relation to myself, because it is impossible to know (as believer) and not to know (as a knower, since my belief is absolute) the possibility of error at the same time. From where its meaning and usage comes from? It can come from only from the others who have the perspective to myself and my beliefs which I don't have. Only they can see that I am stupid or make errors and believe in something absolutely that is not true. I can perceive myself only as thinking and knowing, but for them my thinking may be stupidity and knowing is "absolute believing". Of course I can try to see myself as others do, like "stupid" for example, but this remains an empty word for me, because I don't have that necessary distance from myself as others do. Of course I can see others "stupid" in the same way as they see me. But I can't see much non-contradictory usage of the "absolute belief" which doesn't refer to my (or their) foolishness or errenousness, because it is something that reduces my (or their) knowing to believing. This fool-making process gives life to this phenomenon, because it is hard to see how it can exist in itself, without it.