An input composed entirely of titles should report an ambiguity — "The Right Hon. the President of the Queen's Bench Division"

[derek73]

A name parser handed no name part still has to report something, and the current answer (the last title-vocabulary word becomes the family name — Division here) is the convention working as accepted, not a bug (the v1 xfail is being retired as not-fix).

What's missing is the record-the-guess half of the 2.0 doctrine: when every token is title vocabulary, the parser decided by convention and should say so on ambiguities, the way single-word-name conventions are being examined in #449.

Open mechanics: a new AmbiguityKind or an existing one, and whether the same report covers all-suffix inputs.