Felicitous

The brightest passenger in the ship, and the most interesting and felicitous talker, was a young Canadian who was not able to let the whisky bottle alone.

Walter again pursued his way, lost in a very mixed reverie; sometimes writhing under an idea of degradation, in thus making a trade of his talents; and then, again, somewhat consoled by the pride of art; for how many felicitous and stinging epigrams arose in his mind!

As a post-prandial speaker, however, Thackeray was undeniably the reverse of felicitous.

The recommendations of the experts, however, have not proved very felicitous. […] [S]cant regard has been paid to Albania's much stronger claims, both on ethnographical and on strategical grounds, in the North, […]

[…] Sykewar was not conceived, in [P. M. A.] Linebarger's felicitous phrase, as "warfare psychologically waged."

There are a variety of charms, of various kinds, for which there are no names and no particular uses; but they are considered felicitous, and are therefore worn by the poorer classes, who cannot buy the more valuable charms.

The same chronicler [John Capgrave] makes Henry of Agincourt die a day earlier than he really did, apparently only for the purpose of manufacturing a sort of coincidence. 'His end fell well on the feast of Saint Felix, for he was felicitous in all things—felicitous in endowing the church, felicitous in ordering more clearly the divine offices, felicitous in the administration of justice, and in fine, felicitous in all his life.[']

He is looking the very picture of health, and on the whole his dreams are felicitous. For instance, last night he dreamt that he had been buying strawberries as large as gourds. It proves the magnificent vitality of his dreams.

This sentence is grammatical; it is just not felicitous.

The aim of this paper is to compare rst [rhetorical structure theory], sdrt [segmented discourse representation theory] and discourse dependency dags [directed acyclic graphs] with respect to the following question: do these formalisms allow the representation of all the discourse structures which correspond to felicitous discourses and exclude those which correspond to infelicitous discourses?