While all modern variants of the acre contain 4, 840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends on which yard it is based on.

While an exact number has not been determined, thousands of Canadians have purchased and used what they contend to be grey market radio and television services, licensed in the United States but not in Canada.

While most small corporations do not have a 2 / 3 vote requirement, in the exact opposite, most large corporations especially those incorporated in Delaware, do have a 2 / 3 vote requirement.

While historians disagree over the exact authorship of the work, the writing contains clear indications of Allen's style.

While the exact definition and what is included as extreme sport is debatable, some attempted to make classification for extreme sports.

While the exact location of the grave is unknown, a stone was added in the 19th century to mark a grave traditionally thought to be Calvin's.

While the exact cause of primary lymphedema is still unknown, it generally occurs due to poorly developed or missing lymph nodes and / or channels in the body.

While the exact relationship of the short and apparently primitive text of Q1 to the later published texts is not resolved, Hardin Craig among others has suggested that it may represent an earlier draft of the play and hence would confirm that the play referred to in 1589 is in fact merely an earlier draft of Shakespeare's play.

While the exact cause of this behavior is unknown, springbok exhibit this activity when they are nervous or otherwise excited.

While her exact route is unknown, Tubman made use of the network known as the Underground Railroad.

While the exact style of the wine will vary from producer, some of the terroir characteristics associated with California Chardonnay include " flinty " notes with the Russian River Valley and mango & guava from Monterey.

While the exact meaning of the term layer-4 switch is vendor-dependent, it almost always starts with a capability for network address translation, but then adds some type of load distribution based on TCP sessions.

While this greatly reduced the bandwidth requirements for spammers at a time when Internet connections were limited, it forced each spam to be an exact copy and thus easier to detect.

While the issue of the exact theological structure and composition of the Sermon on the Mount is subject to debate among scholars, specific components within it, each associated with particular teachings, can be identified.

While his motives for founding this order are ultimately unknown, it was said to be all for his own political and personal gain and to also exact vengeance on his enemies.

While the exact origins of chess are unclear, modern rules first took form during the Middle Ages.

While the video signal can easily hide the head-switching point in the invisible vertical retrace section of the signal, so that the exact switching point is not very important, the same is obviously not possible with a continuous audio signal that has no inaudible sections.

While the exact cause of endometriosis remains unknown, many theories have been presented to better understand and explain its development.

While Widukind was considered the leader of the Saxon resistance by the Franks, his exact role in the military campaigns is unknown.

While variants turn up in other places ( for example a poem often ascribed to Virgil called Moretum contains the phrase E Pluribus Unus ), this is the oldest known use of the exact phrase.

While the exact provenance of the word " poutine " is uncertain, some of its meanings undoubtedly result at least in part from the influence of the English word pudding.

While the exact origins of the wave may be in dispute, Seattle was the first place to routinely perform it.

While there is no consensus on the exact meaning of the name Itzamna, it may be significant that itz is a root denoting all sorts of secretions ( such as dew, sap, and semen ) and also sorcery.

While the exact mechanisms have yet to be elucidated, peroxidases are known to play a part in increasing a plant's defenses against pathogens.

While the earliest artifacts date to the Middle Neolithic era, there have been documented habitations in Attica from the Early Neolithic ( 6th millennium BC ).

While there are many competing claims for the earliest powered, heavier-than-air flight, the most widely-accepted date is December 17, 1903 by the Wright brothers.

While the date of composition varies wildly among scholars, ranging from the era of Plato and Aristotle to the seventh century CE.

While not rigorous, the empirical evidence to date supports this belief ".

While the team didn't wear the throwback uniform exactly on Thanksgiving Day in those two years, Dallas wore them on a date around Thanksgiving for those two years.

While contemporaneous accounts are clear that the handshake took place on Saturday, some historians have changed the date of the merger to Sunday, January 1, 1832.

While it was once thought that Locke wrote the Treatises to defend the Glorious Revolution of 1688, recent scholarship has shown that the work was composed well before this date, and it is now viewed as a more general argument against absolute monarchy ( particularly as espoused by Robert Filmer and Thomas Hobbes ) and for individual consent as the basis of political legitimacy.

While the date of his death is not known, " Dowland's last payment from the court was on 20 January 1626, and he was buried at St Ann's, Blackfriars, London, on 20 February 1626.

While earliest known fossils of anatomically modern humans date from around 195, 000 years ago, the matrilinear most recent common ancestor shared by all living humans ( dubbed Mitochondrial Eve ), is dated to about 120-150 thousand years ago.

While some Eastern Orthodox national churches have accepted the Gregorian calendar dates for feast days that occur on the same date every year, the dates of all movable feasts ( such as Easter ) are still calculated in the Eastern Orthodox churches by reference to the Julian calendar.

While still uncertain of exactly how and when the new material would be released, at the time he projected a tentative Spring 2011 release date.

While some archaeologists argue that Rome was indeed founded in the middle of the 8th century BC ( the date of the tradition ), the date is subject to controversy.

While reincarnation has been a matter of faith in some communities from an early date it has also frequently been argued for on principle, as Plato does when he argues that the number of souls must be finite because souls are indestructible, Benjamin Franklin held a similar view.

While tying it to one fixed date would serve to underline the belief that Easter commemorates an actual historical event, without an accompanying calendar reform it would also break the tradition of Easter always being on a Sunday, established since the 2nd century AD and by now deeply embedded in the liturgical practice and theological understanding of almost all Christian denominations.

While commercially made slingshots date back to at least 1918, with the introduction of the Zip-Zip, a cast iron model, it was not until the post World War II years saw a surge in the popularity, and legitimacy, of slingshots.

" While it is clear that the Cryptic Corporation has chosen to share this information publicly, no further confirmation — nor any context as to the roles of " Chuck " and " Bob " in the group, or if these names are, indeed, the names of the group's members — appears to have been issued to date.

While not her highest chart debut, debut sales for From the Choirgirl Hotel are Amos's best to date, selling 153, 000 copies in its first week.

While there is no clear answer as to why, this custom of leaving pebbles may date back to biblical days when individuals were buried under piles of stones.

While November 26 is the official date, theologically, the pontificate began in August when he was ordained as Bishop of Rome.

While the term " think tank " originated in the 1950s, such organizations date to the 19th century.

While archaeologists can use the technique to date the piece of wood and when it was felled, it may be difficult to definitively determine the age of a building or structure that the wood is in.

While the earliest extant sketches date from December 1856, it was not until August 1857, however, that Wagner began devoting his attention entirely to the opera, putting aside the composition of Siegfried to do so.

While it forms an integral part of the Christian calendar, particularly in Catholic regions, some carnival traditions may date back to pre-Christian times.

While the precise date of composition remains unknown, the play was certainly produced as early as 1611.