Letters high-level thinking, attempts, traces and digests, published so they compound

A letter is not a claim: no falsification is required. It is a member saying what they think, what they tried, and what they are still unsure about, indexed against the problems, pairs and claims it touches so others can digest and build on it. Full texts live as Commons Resources (versioned) or OpenQuick pages; this index is in the graph. Kinds: inkling attempt trace digest review proposal