Your response to this confused me. I didn't ask whether it was something we can do without. The question was simple, it was about if skeptism can have it's limits because to me doubting doubt is psychologically impossible. Doubt is an affirmative position one where you can't make up your mind about something. You can question it's characteristics but it is what it is.
Doubt is suspension of judgement -- not proceeding to a conclusion that one either does or does not believe, either does or does not trust, etc. A state of uncertainty.
But when applying doubt to itself (Can you doubt "doubt"?
), how could doubt be employed thusly if there was uncertainty of doubt being possible? The inquiry needs doubt, it can't present its "asking" via the alternative of doing without doubt. (To wit: "Can you [blank] doubt?" Even substituting its definition or a synonymous description in the blank is still what is meant and represented by the word "doubt"). So the question is bogus, it's not really requesting an answer to Can you doubt "doubt"?
, since from the outset it upholds that doubt must be so in order to apply doubt to itself.
If nothing else, we are surely demonstrating in this "hair-splitting" how annoying language eventually gets, how ambiguous it may reveal itself to be at times, how dementedly circular or paradoxical an analysis of it can lead at times -- how it can have limitations or spawn its own additional puzzles when it comes to representing "what's going on"!
For instance, I could now perversely point-out that there is "doubt" used as a verb and "doubt" used as a noun. So that Can you doubt "doubt"?
involves a distinction not formerly made in my scrutiny above: Of a person ("a you") engaging in a supposed particular action (doubt) applied to a supposed particular thing (doubt). However, this as well potentially wanders-off into a maelstrom of discursive considerations, protests, declarations of outrage, etc:
"But doubt (as a noun) is not a concrete phenomenal object! It's a concept or abstract summary of either a set of physical relationships within a brain (neural state of uncertainty), or a set of body behaviors outwardly indicating or interpreted as such, or a psychological state that does not easily reduce to the physical, or...."
"The doubt in the question referred to a broad and general conception of doubt, not a particular instance of it..."
"Hold on, Hosea! Even though there is 'doubt' as a verb and 'doubt' as a noun, they are surely still referring to the same thing somehow, different sides of the same coin, yata, yata, yata..."