Various theories exist regarding the origin of the name itself.

Various theories have been proposed to account for its origins and characteristics, focusing on a variety of factors including the social and civic peculiarities of Florence at the time ; its political structure ; the patronage of its dominant family, the Medici ; and the migration of Greek scholars and texts to Italy following the Fall of Constantinople at the hands of the Ottoman Turks.

Various theories and views of truth continue to be debated among scholars and philosophers.

Various theories have claimed that Gediminas was either his predecessor Grand Duke Vytenis ' son, his brother, his cousin, or his hostler.

Various theories have been put forward for the nickname, including the descendant relation to cotton duck fabric, the waterproof characteristics of a duck bird, and even the 1942 amphibious military vehicle DUKW which was pronounced " duck ".

Various theories and legends exist about the stone's history prior to its residence at Scone:

Various theories on who supported him and why are postulated based on what he did while in office, but all agree that Sulla was correct in his distrust.

Various theories have been put forward to explain the occurrence of hallucinations.

Various theories abounded regarding his disappearance ranging from his death by accident or foul play to McDermott staging his disappearance to avoid child support payments to his ex-wife, actress Yvette Nipar.

Various theories have emerged to explain the purported physical differences between them and their fellow Bantu-speaking neighbors, the Tutsi.

Various government officials and men aboard the Maddox have suggested similar theories.

Various scientists have formed their own theories to explain how the " 20th century manufactured " anatase in the Vinland Map ink could have got into genuine medieval ink.

Various theories have been proposed about the origins and development of the valkyries from Germanic paganism to later Norse mythology.

Various theories have been promoted.

Various conspiracy theories and other such hypotheses have arisen to speculate about the origins of HIV / AIDS.

Various other recent social theories concerning gift economies exist.

Various other theories of aging exist, and are not necessarily mutually exclusive.

Various theories have attributed the wave of extinctions to human hunting, climate change, disease, a putative extraterrestrial impact, or other causes.

Various theories have been discussed as to Adams's failure to reply, such as his general nervousness, procrastination and disorganisation.

Various theories in mechanics by physicists during the same period of time, notably fluid dynamics and Newton's laws of motion, led to the foundation of modern aerodynamics.

Various conspiracy theories circulated about what those purposes might be.

Various theories of why the Spanish flu was " forgotten " include the rapid pace of the pandemic, which killed most of its victims in the United States, for example, within a period of less than nine months, resulting in limited media coverage.

Various writers suggest that religious or philosophical belief-systems should be seen as worldviews rather than a set of individual hypotheses or theories.

Various theories include jealousy for Versace's role as a " gay icon ", as well as necessity and opportunity in some of the other murders.

Various types of creatures have been suggested to explain both the sightings and what type of creature Bigfoot would be if it existed.

Various attempts to explain this foundered on other difficulties.

Various explanations have been put forth throughout history to explain what fossils are and how they came to be where they were found.

Various other opportunities for a reprieve for Brian are denied as, one by one, his " allies " ( including Judith and his mother ) step forward to explain why they are leaving the " noble freedom fighter " hanging in the hot sun.

Various evolutionary ideas had already been proposed to explain new findings in biology.

Various arguments are presented to explain the high presence of psychic abilities in the human population of Darkover.

Various other legends exist to explain the name's origin.

Various medical and psychological explanations for the observed symptoms have been explored by researchers, including psychological hysteria in response to Indian attacks, convulsive ergotism caused by eating rye bread made from grain infected by the fungus Claviceps purpurea ( a natural substance from which LSD is derived ), an epidemic of bird-borne encephalitis lethargica, and sleep paralysis to explain the nocturnal attacks alleged by some of the accusers.

Various suggestions have been made to explain this.

Various explanations and etymologies have been proposed to explain these discrepancies in the names of Neuilly recorded over the centuries.

Various explanations have been attempted to explain this occurrence, and also the alleged fact that Plataea and Mycale took place on the same day.

Various sources explain the role of the ghostwriter and how competent writers can get this kind of work.

Various theories have been proposed to explain the short stature of pygmies.

Various scenarios have been advanced to explain Kiya's disappearance.

Various hypotheses have been formulated to explain these contrasts.

Various experimental results demonstrate that the dance does convey information, but the use of this information may be context-dependent ( e. g. ), and this may explain why the results of earlier studies were inconsistent.

Various suggestions have been made to explain this discrepancy ; Michael Jan Friedman's My Brother's Keeper trilogy speculates this results from an in-joke between Mitchell and Kirk.

Various arguments have been to explain the root cause of Islamic terrorism.

Various hypotheses have been advanced to explain the pathogenesis of spinal dermoids, the origin of which may be acquired or congenital.

Various theories have been put forward to explain the prevalence of implacable hostility:

Various speculative proposals to explain this parameter have been suggested: for example, an argument due to Olaf Dreyer based on quasinormal modes.