This is the second title concept of a Crispin Wright essay that uses Jones swallowing deadly nightshade berries to illustrate the transmissibility of evidence. This concept titles a 1941 G. E. Moore lecture which argues the skeptic’s premise that he doesn’t know he’s standing up if he doesn’t know he’s not dreaming “cuts both ways.” A book titled for this concept describes how its author said “This fellow isn’t insane. We are only doing philosophy” to a garden visitor who overheard his companion say, “I know that that’s a (*) tree.” (10[1])The gnomic claim (10[1])that “a doubt that doubted everything would not be a doubt” appears in that book titled for this concept which criticizes G. E. Moore’s “here is one hand” argument. For 10 points, a posthumously published book by Ludwig Wittgenstein is titled (10[1])after (10[1])what epistemological (10[2])concept (10[1])that corresponds to the absence of doubt? (10[1])■END■ (10[1])