Willard Thorp, in his new book, American Writing In The Twentieth Century, observes, quite validly it seems: `` Certain subjects are conspicuously absent or have been only lightly touched.

Certain features we have touched upon: philosophy as a logical, deductive system from which a social science methodology can be built up ; ;

`` Certain people must have known about it ''.

Certain facts of their lives have been attributed to him, as well as some of their works: thus the Life of St Bernard should be ascribed to Alain of Auxerre and the Commentary upon Merlin to Alan of Tewkesbury.

Certain natural substances are reputed to have anxiolytic properties, including the following:

Certain basic teachings appear in many places throughout the early texts, so most scholars conclude that the Buddha must at least have taught these teachings:

Certain indigenous Dayak people ( such as the Kayan, Kenyah, Lun Bawang / Lun Dayeh, Punan Bah and Penan ) living on the island have been struggling for decades for their right to preserve their environment from loggers and transmigrant settlers and colonists.

Certain elements have no stable isotopes and are composed only of radioactive isotopes: specifically the elements without any stable isotopes are technetium ( atomic number 43 ), promethium ( atomic number 61 ), and all observed elements with atomic numbers greater than 82.

Certain stereotypical patterns of breathing have been identified including Cheyne-Stokes a form of breathing in which the patient's breathing pattern is described as alternating episodes of hyperventilation and apnea.

Certain viruses such as Hepatitis B and human papilloma viruses have been found to cause cancer in humans.

Certain experts have noted the shape of a domestic dog's brain case is closer to the coyote's in shape than that of a wolf's.

* Certain kinds of memory leaks, in which a program fails to free memory occupied by objects that have actually become unreachable, which leads to memory exhaustion if such a behavior is repeated indefinitely.

Certain Jewish thinkers, such as Maimonides, believed that concubines are strictly reserved for kings, and thus that a commoner may not have a concubine ; indeed, such thinkers argued that commoners may not engage in any type of sexual relations outside of a marriage.

Certain chemotherapy agents also have a role in the treatment of other conditions, including ankylosing spondylitis, multiple sclerosis, Crohn's disease, psoriasis, psoriatic arthritis, rheumatoid arthritis, and scleroderma.

Certain scholars have argued that she should be seen as an early feminist who efficiently used language to convey that women could play an important role within society.

Certain rules have traditionally been given for this particular type of definition.

* Certain population segments have been historically under-researched ( racial minorities and people with co-morbid diseases ), and thus the RCT restricts generalizing.

Certain aspects of XP have changed since the book Extreme Programming Refactored ( 2003 ) was published ; in particular, XP now accommodates modifications to the practices as long as the required objectives are still met.

Certain of his film related material and personal papers are contained in the Wesleyan University Cinema Archives to which scholars and media experts from around the world may have full access.

Certain insurance products and practices have been described as rent-seeking by critics.

Certain courts, particularly the United States Supreme Court and most state supreme courts, have discretionary jurisdiction, meaning that they can choose which cases to hear from among all the cases presented on appeal.

Certain, often more expensive keyboards have a diode between each intersection, allowing the keyboard microcontroller to accurately sense any number of simultaneous keys being pressed, without generating erroneous ghost keys ..

Certain resolutions of these paradoxes, particularly Graham Priest's dialetheism as formalised in LP, have the law of excluded middle as a theorem, but resolve out the Liar as both true and false.

Certain tree species, such as hemlock, have also been particularly depleted by past logging activity.

Certain stones, when examined in thin sections by transmitted light, show a diffraction spectrum due to the extreme delicacy of the successive bands, whence they are termed rainbow agates.

Certain persons in England during the reign of King Henry I of England were called Acephali because they had no lands by virtue of which they could acknowledge a superior lord.

Certain other state agencies enjoy considerable operational independence and autonomy ; they include the electrical power, the nationalized commercial banks ( which are open to competition from private banks ), and the social security agency.

Certain people are known even to people unfamiliar with the area in which they excelled.

Certain Latin-Rite Catholic priests may receive a dispensation to be married before ordination, and all Eastern Catholic priests outside the United States are also permitted to be married, provided they are so before ordination.

Certain countries such as the United Kingdom are unaffected as they maintain more stringent gun control laws than those effectively set as a minimum by the European Union.

Certain tubular structures from the fetal period are referred to as ligaments after they close up and turn into cord-like structures:

Certain Loa display very distinctive behaviour by which they can be recognized, specific phrases, and specific actions.

Certain Loa can become obstinate, for example the Ghede are notorious for wanting just one more smoke, or one more drink, but it is the job of the Houngan or Mambo to keep the spirits in line while ensuring they are adequately provided for.

Certain traditions ascribe the book to Zerubbabel and Nehemiah ; others, still, to Malachi, whom they designate as a Levite and a member of the " Great Synagogue.

Certain American conservatives, fundamentalists and evangelicals believe that the scriptures are both human and divine in origin: human in their manner of composition, but divine in that their source is God, the Holy Spirit, who governed the writers of scripture in such a way that they recorded nothing at all contrary to the truth.

Certain local Muslim wālis decided to oppose him, but instead of appealing to the distant Caliph, they decided to enlist the nearby Christian Franks.

* Certain types of nonwoven fabric are referred to as " SMS ", because they superimpose spun layers on melted layers on more spun layers

Certain groups turn to destruction of property in order to immediately stop environmental destruction or to make visible arguments against forms of modern technology they consider detrimental to the earth and its inhabitants.

Certain regions are not considered Castilian, such as Valencia and the Balearic Islands because historically they belong to the Crown of Aragon and because their local languages are Catalan dialects.

Certain nouns can take plural verbs even though they are singular in form, as in The government were ... ( where the government is considered to refer to the people constituting the government ).

Certain fixed days are always fast days, even if they fall on a Saturday or Sunday ( in which case the fast is lessened somewhat, but not abrogated altogether ); these are: The Decollation of St. John the Baptist, the Exaltation of the Cross and the day before the Epiphany ( January 5 ).

Certain " casting resins " and synthetic resins ( such as epoxy resin ) have also been given the name " resin " because they solidify in the same way as some plant resins, but synthetic resins are liquid monomers of thermosetting plastics, and do not derive from plants.

Certain observers, however, speculate that they may be from Poland or Belarus.

Certain the attachment of a major star would change Wizan's mind, Feldman approached him once again, but Wizan insisted that as much as the studio liked Ford, they still weren't interested in making a " rural movie.

" Certain displays of their selfishness were commented upon by George Murray Levick, a Royal Navy Surgeon-Lieutenant and scientist who also accompanied Scott on his ill-fated British Antarctic Expedition 1910, during his surveying of penguins in the Antarctic: " At the place where they most often went in water, a long terrace of ice about six feet in height ran for some hundreds of yards along the edge of the water, and here, just as on the sea-ice, crowds would stand near the brink.

Certain critics argue that Christian rock music and its subjects seldom appeal to non-believers: Allmusic wrote that " unless a Christian rocker plans to perform for Christian audiences exclusively, he or she needs to provide music that secular audiences will find relevant -- music that listeners can relate to on some level even if they aren't practicing Christians.