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Claim analyzed
History“William I of England (William the Conqueror) was born around 1028 in Falaise, Normandy.”
Submitted by Nimble Eagle f9bf
The conclusion
Open in workbench →The evidence strongly supports this description. Reliable historical references commonly state that William the Conqueror was born in Falaise, Normandy, and date his birth to circa 1028. Some sources give 1027, but that uncertainty is consistent with the claim's qualified wording, “around 1028.”
Caveats
- The exact birth year is not fully settled; some reputable sources give 1027 rather than 1028.
- The strongest support comes from established reference works and institutional histories, not from social media, travel sites, or user-generated posts.
- The birthplace is far less disputed than the year, so the date should be understood as approximate rather than exact.
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Sources
Sources used in the analysis
William I (born c. 1028, Falaise, Normandy [France]—died September 9, 1087, Rouen) was a noble who made himself the mightiest in France and then changed the course of England’s history through his conquest of that country in 1066.
William the Conqueror (c. 1028 – 9 September 1087), sometimes called William the Bastard, was the first Norman king of England (as William I), reigning from 1066 until his death. Born c. 1028 Falaise, Duchy of Normandy. William was born in 1027 or 1028 at Falaise, Duchy of Normandy, most likely towards the end of 1028.
Born around 1028, William was the illegitimate son of Duke Robert I of Normandy, and Herleve (also known as Arlette), daughter of a tanner in Falaise.
William of Normandy, known as 'the Conqueror', was born at Falaise in 1027, a natural son of Robert, Duke of Normandy and a girl called Herleve.
William was born in 1027 or 1028 at Falaise, Normandy, most likely towards the end of 1028. He was the only son of Robert I, Duke of Normandy, son of Richard II, Duke of Normandy.
King William I The Conqueror (1066 - 1087) Born: September 1028 at Falaise, Normandy. Parents: Robert I, Duke of Normandy, and Arlette daughter of Fulbert (illegitimate).
Born in Falaise in 1027, he is the natural son of Robert the Magnificent, Duke of Normandy, and Arlette, daughter of a tanner. 1027 – Birth in Falaise. Born illegitimately in Falaise in 1027 to Robert the Magnificent, Duke of Normandy, he was commonly known as William the Bastard.
The main residence of the Dukes of Normandy, Falaise was the birthplace of William the Conqueror in 1027. Visit his castle. Always associated with William the Conqueror as his birthplace, the present stone castle is, as in Caen, mostly the work of his youngest son, Henry I.
Château de Falaise in Normandie, also known as Château de Guillaume-le-Conquérant as it was the birthplace of William II Duke of Normandy and King of England. However, what makes Falaise Castle stand out is that it was the birthplace (in 1027) of one of the most emblematic figures in French history, William the Conqueror!
William the Conqueror, Duke of Normandy, King of England, son of Robert I, Duke of Normandy and Harlette de Falaise, was born about 1028 in Falaise, Normandy, France and died on 9 Sep 1087 in Rouen, Normandy, France about age 59. Birth Notes: Wikipedia (William the Conqueror) and thepeerage.com give b. in 1027 or 1028.
William the Conqueror was born around 1028 in Falaise, Normandy (modern-day France). He was the illegitimate son of Duke Robert I of Normandy.[6]
Descended from a line of powerful Scandinavian lords, William was born at Falaise Castle in 1027. He was the illegitimate son of Robert the Magnificent, Duke of Normandy, and Arlette, a tanner’s daughter.
Birthplace of William the Conqueror and cradle of the Anglo-Norman dynasty, Falaise Castle was one of the principal residences of the Duke of Normandy, both a fortress and a stately home.
William The Conqueror, King of England I b. Abt 1028 Falaise, Normandie, France, gender male, death 9 Sep 1087 Priory of Saint Gervase, Rouen, Duchy of Normandy, France. William I (c. 1028 – 9 September 1087), usually known as William the Conqueror and sometimes William the Bastard, was the first Norman monarch of England, reigning from 1066 until his death in 1087.
Born at Falaise around 1027–1028, William was the only son of Duke Robert I of Normandy and Herleva of Falaise.[9]
Normandy was the birthplace and home of William, Duke of Normandy, and after 1066, King of England. The imposing medieval stronghold of William the Conqueror’s Castle still dominates the town of Falaise; a reminder that this was the birthplace of the fearsome William Duke of Normandy.
Falaise as we see it now was built after the birth here in 1028 of William the Conqueror. (He is ‘Conqueror’ only to the British; to the French he is mere William of Normandy - Guillaume de Normandie).
It was in this castle that William the Conqueror was born in 1027. After many years of rehabilitation, the restored dungeons opened to the public in 1997. With audio guides and touchscreens, the visit tells the story of William the Conqueror and the Anglo-Norman epic.
2027 marks the millennium of the birth, in Falaise, of William the Conqueror, also known as William of Normandy or William the Bastard. William the Conqueror was born around 1028 in Falaise, Normandy; he was the illegitimate son of Duke Robert I of Normandy.
William the Conqueror was born around 1028 in Falaise, Normandy (modern-day France). He was the illegitimate son of Duke Robert I of Normandy.
Born, Dec 1027, Falaise, France. Died, 9 Sep 1087, Rouen, Normandy, France.
Modern historians generally agree that William was born in Falaise in the late 1020s, most commonly given as around 1028, though exact records from the period do not survive. His birthplace in Falaise, in the Duchy of Normandy, is attested by later medieval chronicles and local tradition.
The Falaise Castle in Normandy is where William I of England, commonly "William The Conqueror" was born. Much of the medieval fortress was built by his son, Henry I and later expanded in the One Hundred Years War.
The castle features a blend of Norman architecture and elements from the 13th century, serving as the birthplace of William in 1028. I visited Falaise, the birthplace of William the Conqueror! The castle is partially Norman and partially 13th century and it is where William was born all the way back in 1028.
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Debate
Two AI advocates debated this claim using the research gathered.
Argument for
The claim is strongly supported by multiple highly authoritative sources: Encyclopedia Britannica (Source 1) explicitly states William I was 'born c. 1028, Falaise, Normandy,' and this is corroborated by Wikipedia (Source 2), The Royal Family (Source 3), Britroyals (Source 6), and FamilySearch (Source 15), all independently confirming a birth around 1028 in Falaise. While some sources cite 1027 as an alternative, the dominant scholarly consensus — reflected across the most authoritative references — places his birth 'around 1028' in Falaise, Normandy, making the claim accurate as stated.
The Proponent's argument commits a cherry-picking fallacy by treating “around 1028” as a settled consensus while the brief's own institutional and local-history sources explicitly date the birth to 1027 (Westminster Abbey, Source 4; Bayeux Museum, Source 7; Normandie Tourisme, Source 8; Normandy Tourism, Source 12), showing the date is genuinely contested rather than merely a footnote. Even the Proponent's cited “corroboration” concedes the uncertainty—Wikipedia states “born in 1027 or 1028” (Source 2)—so asserting “born around 1028” as a single factual claim overstates the precision the evidence supports, regardless of agreement on Falaise as the birthplace (Source 1).
Argument against
The motion is false because the research brief itself shows a live dispute over the date: multiple institutional/local-history sources explicitly give 1027 (Westminster Abbey, Source 4; Bayeux Museum, Source 7; Normandie Tourisme, Source 8; Normandy Tourism, Source 12), so stating “born around 1028” as a single asserted fact is inaccurate. Even Wikipedia concedes the uncertainty (“born in 1027 or 1028,” Source 2), meaning the claim overstates precision and should be rejected as written despite agreement on Falaise as the birthplace (e.g., Source 1).
The Opponent's argument conflates a genuine historical uncertainty with a factual error, ignoring that the claim itself uses the qualifier 'around 1028' — a formulation explicitly adopted by the highest-authority sources, including Encyclopedia Britannica (Source 1) and The Royal Family (Source 3), precisely to accommodate the 1027–1028 ambiguity. Furthermore, the Opponent selectively elevates lower-authority tourism and local-history sources (Sources 7, 8, 12) over the dominant scholarly consensus represented by Source 1, Source 2, and Source 6, all of which converge on 'around 1028' as the standard formulation — meaning the claim, as worded, is accurate.
Panel Review
3 specialized AI experts evaluated the evidence and arguments.
Reviewer 1 — The Logic Examiner
Several independent references directly state William I was born in Falaise and date it approximately to 1028 (e.g., Britannica explicitly: “born c. 1028, Falaise, Normandy” in Source 1; similarly “born around 1028” in Source 3; and “1027 or 1028 … most likely towards the end of 1028” in Source 2), which logically supports the claim's qualified phrasing “around 1028 in Falaise.” Although other sources give 1027 (Sources 4, 7, 8, 12), that disagreement does not logically negate an “around 1028” statement because “around” can encompass adjacent years, so the claim remains mostly true rather than false.
Reviewer 2 — The Source Auditor
The most authoritative source in this pool, Encyclopedia Britannica (Source 1), explicitly states William I was 'born c. 1028, Falaise, Normandy' — the 'c.' (circa) qualifier matching the claim's 'around 1028' formulation exactly. The Royal Family website (Source 3) and Wikipedia (Source 2) also confirm 'around 1028' and 'c. 1028' respectively, with Wikipedia noting 'born in 1027 or 1028 at Falaise, most likely towards the end of 1028.' The claim uses the appropriately hedged 'around 1028,' which is precisely the formulation adopted by the highest-authority sources to accommodate the genuine 1027–1028 scholarly uncertainty. Some lower-authority sources (Bayeux Museum, Normandie Tourisme, Westminster Abbey) cite 1027, but these do not outweigh the dominant scholarly consensus from Britannica and comparable references. The birthplace of Falaise, Normandy is uncontested across all sources. The claim, as worded with 'around 1028,' accurately reflects the scholarly consensus and is confirmed by the most reliable independent sources.
Reviewer 3 — The Precision Analyst
The claim's use of the qualifier 'around 1028' perfectly matches the historical uncertainty documented in the evidence, with major sources like Encyclopedia Britannica (Source 1) and Wikipedia (Source 2) citing 'c. 1028' or '1027 or 1028'. The location of Falaise, Normandy is also universally supported across all sources. Therefore, the claim is true as worded.