It ran counter to the ideas suggested in 1527 on the captivity of Clement VII., that England and France should set up independent patriarchates; and its success depended upon the problematical destruction of Charles V.'s power in Italy.
Apart altogether from the facts that this investigation is still in its infancy and that the conditions of experiment are insufficiently understood, its ultimate success is rendered highly problematical by the essential fact that real scientific results can be achieved only by data recorded in connexion with a perfectly nortnal subject; a conscious or interested subject introduces variable factors which are probably incalculable.
Whatever may be the true affinity of these problematical mammals, undoubted rodents are known from the Lower Eocene of both Europe and North America.
Such units frequently occur in pairs, one member of the pair being characterized by the presence, the other by the absence of a problematical body at least comparable with a ferment, the result of the presence or absence being a notable modification of the whole organism or of parts of it.
In the latter part of the 6th century we find some restoration, some revival of the old monarchy in the person of Zerubbabel (520 B.C.); but again the course of events is problematical (JEws, § 20).
The recent discovery in the Tasmanian " schizopod " Anaspides, of what is believed to be a living representative of the Carboniferous and Permian Syncarida, has, however, afforded a clue to the affinities of some of these problematical forms.
20) is referred to in a problematical passage from which it would appear to have been of cedar.
Voltaire said that it was full of commonplaces, and that what was original was false or problematical; Rousseau declared that the very benevolence of the author gave the lie to his principles; Grimm thought that all the ideas in the book were borrowed from Diderot; according to Madame du Deffand, Helvetius had raised such a storm by saying openly what every one thought in secret; Madame de Graffigny averred that all the good things in the book had been picked up in her own salon.
From the Ordovician and Silurian, however, a certain number of authentic remains of Algae (among many more that are questionable) have been investigated; they are for the most part either verticillate Siphonae, or the large - possibly Laminariaceous - Algae named Nematophycus, with the problematical but perhaps allied Pachytheca.
Their adaptations to parasitic life in vertebrate animals appear to have involved such modifications of structure and development that their affinities are quite problematical.