The rotating slide rule bezel is bi directional and and non ratchet.
This view has the merit of giving the book a practical religious aim - a sine qua non to any theory of an early Christian writing.
In the Liber Sad-der, indeed (Porta xxv.), we read, " Cavendum est tibi a jejunio; nam a mane ad vesperam nihil comedere non est bonum in religione nostra "; but according to the Pere de Chinon (Lyons, 1671) the Parsee religion enjoins, upon the priesthood at least, no fewer than five yearly fasts.
The great outburst of Sentences at a later time has been referred to the consternation produced by Abelard's Sic et Non.
It found its first adherents and its first defenders among the clerics and learned men grouped around Faber (Lefvre) of Etaples at Meaux; while Marguerite of Navarre, des Roynes la non.
