(urth) Severian's memory

[James Wynn]

>The narrator seeks to recall the incident and does so, but the effort 
>produces a false positive that is duly recorded. This isn't a logical flaw, 
>but one of woefully subjective methodology.

The logical flaw is his argument "I do not forget." which is based 
(presumably) on a specific unsupported premise: "I would know if I had 
forgotten something." This is the logical flaw defined as Begging The 
Question.