Disputed Statements

Icon of Christ and Abbot Mena, Sacred Art & Iconography

Standing Scholarly debate

Concerns Date of Creation

Currently States 700 to 799 CE per the Louvre's own current official record; much popular literature, and Wikipedia's own summary text, instead date the panel to the second half of the sixth century and describe it as the oldest known Coptic icon, a claim the museum's present cataloguing does not support

Both figures are named in the entity description. This entry follows the Louvre's own current cataloguing as the more authoritative and current source rather than independently resolving which dating the wider scholarly literature now favors.

Source Musee du Louvre, "Le Christ et l'abbe Mena" collection record tier 1

Ifrit, Mythical Creatures

Standing Scholarly debate

Concerns Origin of the Name

Currently States Arabic philologists have traditionally connected ifrit to the root ayn-fa-ra, carrying senses of rebellion and strength, or, in a second reading of the same root, "to roll an opponent in the dust," a description of overpowering an enemy. The word does not appear in pre-Islamic poetry and occurs only once in the Quran, so neither reading can be checked against earlier usage. A separate proposal derives it instead from Middle Persian afridan, "to create," connecting it to an Avestan spirit-word and suggesting the term entered Arabic through Zoroastrian cultural contact rather than from a native Arabic root. No single derivation has settled the question.

Source Islam, Arabs, and the Intelligent World of the Jinn, Amira El-Zein tier 1

Igigi, Mythical Creatures

Standing Scholarly debate

Concerns Point in Dispute

Currently States Whether Anunna and Igigi named two fixed and separate classes of gods, or two overlapping terms whose senses shifted and in places exchanged places between periods

The usage is genuinely inconsistent across the record. Some readings treat the two as a stable pair of ranks, senior and junior; others hold that the terms overlap in the earlier material and only separate, and then invert, in the later. The Oracc Ancient Mesopotamian Gods and Goddesses entry adds that it is not entirely clear what distinguishes the two groups, that some gods appear to belong to both, and that the question is in need of a comprehensive new study.

Source Gods, Demons and Symbols of Ancient Mesopotamia: An Illustrated Dictionary, Jeremy Black and Anthony Green tier 2

Igigi, Mythical Creatures

Standing Scholarly debate

Concerns Who May Belong

Currently States How many gods the group held is not agreed: seven, eight and ten have each been argued, and Marduk is the one member the evidence places inside it with confidence

von Soden argued for seven, Kienast for eight, and Black and Green give ten, each on different evidence. Kienast also proposed Ishtar, Asarluhi, Ninurta, Nuska and Shamash among the members, and observed that some gods appear to belong to both the Igigi and the Anunnaki. Marduk is secure because the prologue to the Code of Hammurabi says the Anunnaki raised him high among the Igigi.

Source Ancient Mesopotamian Gods and Goddesses, Nicole Brisch (ed.) tier 1

Igigi, Mythical Creatures

Standing Scholarly debate

Concerns Origin of the Name

Currently States Where the name itself came from is not settled: Old Akkadian, Amorite and Arabic origins have each been proposed

Kienast argued for an Old Akkadian origin, von Soden for Amorite, and von Soden later for a possible Arabic connection. The Oracc Ancient Mesopotamian Gods and Goddesses entry sets the three proposals side by side and calls the etymology unclear.

Source Ancient Mesopotamian Gods and Goddesses, Nicole Brisch (ed.) tier 1

Ijma (Scholarly Consensus), Doctrines

Standing Scholarly debate

Concerns Point in Dispute

Currently States Whose agreement binds. Jafari jurisprudence accepts consensus only where it discloses the position of the infallible Imam, which makes its authority derivative rather than independent, and Quranist argument rejects it outright on the ground that the Quran nowhere makes the agreement of scholars binding.

Source Principles of Islamic Jurisprudence, Mohammad Hashim Kamali tier 1

Ijma: The Consensus of the Scholars Is Binding, Beliefs & Restrictions

Standing Scholarly debate

Concerns Point in Dispute

Currently States What counts as consensus: whether it must be the agreement of a single generation, whether the agreement of the Companions is decisive, and whether a consensus once formed can ever be reopened.

Ijma, the consensus of qualified scholars, is the third of the four sources of law recognised across the Sunni schools, holding that once qualified scholars have agreed on a ruling, that agreement is binding and no longer open to challenge; the Jafari school accepts a form of it but reads its authority as resting on the presence of the hidden Imam among those in agreement rather than on the scholars' agreement alone. Kamali's standard textbook on Islamic legal theory records three specific questions the Sunni schools dispute about what counts as valid consensus: whether it must be the agreement of a single generation rather than accumulating across generations, whether the agreement of the Prophet's companions specifically is decisive in a way later consensus is not, and whether a consensus once formed can ever be reopened by a later generation. These questions matter because how consensus is defined determines how much of settled Islamic law could in principle still be revisited, which is why schools with different views of what counts as consensus have not converged: the disagreement is over the mechanism's own scope rather than over any single ruling reached through it.

Source Principles of Islamic Jurisprudence, Mohammad Hashim Kamali tier 1

Ijtihad and taqlid, Doctrines

Standing Scholarly debate

Concerns Origin Period

Currently States Hallaq argues it never closed

Wael B. Hallaq's article Was the Gate of Ijtihad Closed?, International Journal of Middle East Studies 16:1, 1984, challenges the widely repeated claim that independent legal reasoning ceased in Sunni jurisprudence around the tenth century CE. Hallaq's method is close textual analysis of biographical dictionaries and juristic writings from the very period the closure is supposed to have occurred, searching for jurists who explicitly claimed, or were recognised by peers as holding, the status of mujtahid, one qualified to exercise ijtihad. He finds such jurists well beyond the supposed closing date, which is inconsistent with a genuinely closed gate, and argues on that basis that the closure narrative is largely a construction of later scholarship rather than a documented historical event. Because the claim that legal reasoning ever stopped is itself what Hallaq's evidence disputes, the origin period of the ijtihad-and-taqlid doctrine remains an open, argued question rather than a fixed one.

Source Was the Gate of Ijtihad Closed?, Wael B. Hallaq tier 1

Ijtihad and taqlid, Doctrines

Standing Scholarly debate

Concerns Origin Period Start Year

Currently States 900

Wael B. Hallaq's article Was the Gate of Ijtihad Closed?, International Journal of Middle East Studies 16:1, 1984, challenges the widely repeated claim that independent legal reasoning ceased in Sunni jurisprudence around the tenth century CE. Hallaq's method is close textual analysis of biographical dictionaries and juristic writings from the very period the closure is supposed to have occurred, searching for jurists who explicitly claimed, or were recognised by peers as holding, the status of mujtahid, one qualified to exercise ijtihad. He finds such jurists well beyond the supposed closing date, which is inconsistent with a genuinely closed gate, and argues on that basis that the closure narrative is largely a construction of later scholarship rather than a documented historical event. Because the claim that legal reasoning ever stopped is itself what Hallaq's evidence disputes, the origin period of the ijtihad-and-taqlid doctrine remains an open, argued question rather than a fixed one.

Source Was the Gate of Ijtihad Closed?, Wael B. Hallaq tier 1

Ijtihad and taqlid, Doctrines

Standing Scholarly debate

Concerns Origin Period End Year

Currently States 1500

Wael B. Hallaq's article Was the Gate of Ijtihad Closed?, International Journal of Middle East Studies 16:1, 1984, challenges the widely repeated claim that independent legal reasoning ceased in Sunni jurisprudence around the tenth century CE. Hallaq's method is close textual analysis of biographical dictionaries and juristic writings from the very period the closure is supposed to have occurred, searching for jurists who explicitly claimed, or were recognised by peers as holding, the status of mujtahid, one qualified to exercise ijtihad. He finds such jurists well beyond the supposed closing date, which is inconsistent with a genuinely closed gate, and argues on that basis that the closure narrative is largely a construction of later scholarship rather than a documented historical event. Because the claim that legal reasoning ever stopped is itself what Hallaq's evidence disputes, the origin period of the ijtihad-and-taqlid doctrine remains an open, argued question rather than a fixed one.

Source Was the Gate of Ijtihad Closed?, Wael B. Hallaq tier 1

Iliad and Odyssey, Other Writings

Standing Scholarly debate

Concerns Attributed Author / Compiler

Currently States Homer (traditional); products of an oral epic tradition given form in the 8th c. BCE, their single authorship debated since antiquity (the "Homeric Question")

The Homeric Question has been open since antiquity. The poems carry the formulaic diction of oral composition, which argues for a tradition rather than an author; against that, their scale and design have been read as the work of one shaping poet. Whether "Homer" names a person, a guild of singers or a convenient fiction is not settled.

Source The Oxford Classical Dictionary, 4th edition, Simon Hornblower, Antony Spawforth and Esther Eidinow (eds.) tier 1

Imbalu, Rituals

Standing Scholarly debate

Concerns Current Status

Currently States Thriving biennial institution; also debated over unhygienic traditional circumcision, injury and death risk, and pressure on reluctant candidates.

Imbalu is the Bagisu male circumcision initiation of western Kenya and eastern Uganda, held under the authority of the Bagisu people who practice it; the atlas describes its existence and social significance without reconstructing its ceremonial procedure, in keeping with the tradition's own closed status for that material. Jan de Wolf's Circumcision and Initiation in Western Kenya and Eastern Uganda: Historical Reconstructions and Ethnographic Evidence (1983) documents that public health authorities have since promoted medically supervised clinical alternatives to reduce infection and complication risk, and that families and communities differ over whether a clinically performed operation still counts as a full Imbalu, since the medical setting removes elements of the passage the community itself may hold as constitutive. De Wolf's method is historical and ethnographic fieldwork among Bagisu and neighbouring communities, documenting community debate rather than the ritual's own internal procedure. Coercion of reluctant candidates is documented in this literature as a real, not merely hypothetical, concern accompanying the tradition's continuation, which is why current status remains an active and debated question.

Source Circumcision and Initiation in Western Kenya and Eastern Uganda: Historical Reconstructions and Ethnographic Evidence, Jan J. de Wolf tier 1

Imperial Regalia of Japan, Artifacts & Relics

Standing Scholarly debate

Concerns Sword Loss Tradition

Currently States Original Kusanagi reported lost at the Battle of Dan-no-ura, 1185, and replaced

The Wikipedia contributors' Imperial Regalia of Japan entry (2025 access), summarizing Japanese chronicle sources, records the tradition that the sacred sword Kusanagi was lost in the sea during the 1185 naval Battle of Dan-no-ura. The entry's method is a survey of the several disagreeing medieval Japanese chronicle accounts of the loss, and it finds some accounts hold the sword recovered afterward was already a ceremonial replica rather than the original, an account that would mean no true loss of the original sword occurred at all, while other chronicles treat the lost sword as the genuine original.

Source Imperial Regalia of Japan (Wikipedia), Wikipedia contributors tier 3

In ࡏ, Alphabet Letters

Standing Scholarly debate

Concerns A Rival System's Attribution

Currently States The script's ancestry is assigned either to a cursive form of Aramaic, the derivation favored by most script historians, or to the Parthian chancery script used in Sasanian era administrative documents.

According To The Mandaic script

Both derivations are held in the literature and neither has displaced the other. The Aramaic cursive camp points to the letterforms' overall resemblance to other late Aramaic cursive scripts of the region, including Nabataean and Syriac; the Parthian chancery camp points to specific letterforms, including certain medial and final forms, that resemble Pahlavi documentary hands more closely than any Aramaic cursive exemplar. No single find has settled the question, and Mandaic paleography treats it as open pending further comparative work.

Source Iranian Scripts for Aramaic Languages: The Origin of the Mandaic Script, Charles G. Haberl tier 1

Inca Garcilaso de la Vega, Historical Figures

Standing Scholarly debate

Concerns How Its Legacy Is Contested

Currently States That Inca religion recognised one supreme creator above the sun, knowable by reason, with the visible cults secondary to him.

Garcilaso de la Vega's own Comentarios Reales de los Incas, Royal Commentaries of the Incas (1609), written by a man born to a Spanish conquistador father and an Inca noblewoman mother who spoke Quechua from childhood, is read in two opposed ways by modern historians. One camp treats it as genuine Cuzco memory, since Garcilaso heard his mother's kin directly describe the pre-conquest order, preserving material the Spanish extirpation sources missed entirely. The other treats it as a shaped account, built from Renaissance Christian and classical categories by a man writing in Spain to argue for the respectability of his mother's people to a European readership, and points to the crowded ritual world of huacas, mummies and oracles that other, less literary Cuzco sources describe and that Garcilaso's own polished narrative tends to smooth over.

Source Comentarios Reales de los Incas (Royal Commentaries of the Incas), Garcilaso de la Vega, El Inca tier 2

Incorruptibility of the Saints, Miracles

Standing Scholarly debate

Concerns Skeptical Explanation

Currently States Conservators and scientists generally point to ordinary taphonomic factors, sealed coffins, dry conditions and soil chemistry, as sufficient to explain many documented incorrupt-saint cases.

Popular Catholic devotion holds that some saints' bodies resist the ordinary process of decomposition after death, incorruptibility, as a sign of sanctity, and specific cases are venerated on that basis. Ruth Harris's Lourdes: Body and Spirit in the Secular Age (Allen Lane / Penguin Press, 1999), a scholarly study of the Lourdes apparitions and pilgrimage cult set within nineteenth century French religion, medicine and secularization, examines how such physical claims about sanctity functioned within popular devotional culture. The method is historical, reading the church's own canonization records and procedural requirements against the popular expectation that a genuine saint's body should resist decay. The Catholic Church's canonization process does not require incorruption and has canonized many saints whose remains show ordinary decomposition, so the belief functions as popular devotion attached to particular venerated cases rather than a doctrinal claim the church formally requires or investigates as evidence of sanctity.

Source Lourdes: Body and Spirit in the Secular Age, Ruth Harris tier 1

India, Countries

Standing Scholarly debate

Concerns Legal Status

Currently States The constitution declares India a secular state (the word "secular" added by the 42nd Amendment in 1976), guaranteeing freedom of religion under Articles 25-28; marriage, divorce and inheritance are still governed by separate religious personal laws rather than a Uniform Civil Code.

India's constitution declares the country a secular state, the word secular itself only added to the preamble by the 42nd constitutional amendment in 1976 rather than present in the original 1950 text, and guarantees freedom of religion to all citizens under Articles 25 to 28. Separately, marriage, divorce, inheritance and related family matters continue to be governed by distinct personal laws specific to each major religious community rather than by one uniform civil code applying equally to all citizens. Whether India should adopt a single Uniform Civil Code replacing these separate religious personal laws, a possibility named in the constitution's non-binding Directive Principles since 1950 but never legislated nationally, is a long-running political and legal debate: proponents argue it would deliver legal equality regardless of religion, while opponents, concentrated among religious minority communities, argue it would override minority religious practice. The debate remains unresolved because no national government has to date enacted the uniform code the constitution's own directive principles contemplate.

Source Encyclopaedia Britannica (online academic reference), Encyclopaedia Britannica editors tier 2

Indian Museum, Kolkata, Custodians & Museums

Standing Scholarly debate

Concerns Relevant Holding

Currently States Piprahwa Stupa Relics and Gems, the principal share of the 1898 find; a separate share retained by the excavator's family was the subject of a withdrawn 2025 Sotheby's auction

The Indian Museum in Kolkata holds the bulk of the Piprahwa gems, a collection of jewels and reliquary items excavated in 1898 from a stupa near Piprahwa in northern India believed to hold relics of the Buddha, with the excavator's family, the Peppes, having separately retained a smaller share under the colonial-era division of finds then in effect. Buddhistdoor's report, Famed Piprahwa Gems On Display in India After More Than 120 Years Abroad (2026), documents that a planned 2025 auction of the Peppe family's separately held share was contested by the Indian government and by Buddhist organisations internationally, who argued the sale of items understood as sacred Buddhist relics was improper regardless of the family's documented legal title to their share under the original colonial division. The method by which the objection was pressed was public advocacy and diplomatic and legal pressure rather than a dispute over the historical facts of the 1898 excavation or the division of finds, which are not themselves contested. The planned sale was withdrawn following that pressure, and the matter is recorded as debated on the ethical and religious question of selling sacred relics rather than on any unsettled historical fact.

Source Famed Piprahwa Gems On Display in India After More Than 120 Years Abroad, Buddhistdoor tier 2

Indian Ocean, Bodies of Water

Standing Scholarly debate

Concerns Region

Currently States Rimmed by shrines and saints' tombs at every major port. The Saint Thomas Christians of Kerala hold that the apostle crossed it and landed in 52; the community's antiquity and its links to the Church of the East are documented, while the apostolic voyage rests on tradition and the apocryphal Acts of Thomas

The Malabar tradition of an apostolic foundation and the historians' reading, which accepts a very early Indian Christianity without confirming the voyage of Thomas himself, are the two positions.

Source The Indian Ocean, Michael Pearson tier 1

Indigo, Colors

Standing Scholarly debate

Concerns Origin Period Start Year

Currently States 1666

According To Newtonian optics: the seven-colour spectrum

Isaac Newton's own account in Opticks (London, 1704) describes how he arrived at seven spectral colours: his earliest prism observations distinguished five bands, and he settled on seven, adding orange and indigo, by explicit analogy with the seven intervals of the musical octave, a numerological choice rather than a further optical finding. Reading Newton's own text against the continuous gradient a prism actually produces shows the seven-fold division is an interpretive choice about where to draw lines in that continuum, not a count nature supplies; observers from Newton's own time onward have disputed whether indigo is visually distinct from blue and violet at all. Any scheme in this atlas that treats seven colours as given inherits Newton's seventeenth-century analogy to the octave rather than an independent observation.

Source Opticks: or, a Treatise of the Reflexions, Refractions, Inflexions and Colours of Light, Isaac Newton tier 1