MS2 wrote:I'd be interested to hear whether other people think historical research ultimately amounts to anything more than subjective opinion? (And, if so, why and how!)
Once I attempted to try and formalise the process of ancient history with the assistance of a schematic:
ABSTRACTA process is identified to describe the methodology of historical theorizing in which evidence items are registered, one by one. Against each item of evidence hypotheses consistent of simple statements are then registered. These hypotheses are either formulated anew and/or recalled from old hypotheses previously formulated. All investigators are entitled to address any or all items of evidence, or add items of evidence to the register to be addressed. All investigators may select existing hypotheses directly related to each item of evidence, or formulate new hypotheses. General hypotheses may also be selected and/or formulated by all investigators. All these hypotheses, consistent of simple statements representative of the evidence and the conceptual framework of the investigator are input into a "Black Box" which is designated as a "Theory Generator", and theoretical conclusions are output.
Schematic (1)Evidence Items are registered E1, E2, E3, ..., En
(2) For each evidence item hypotheses are formulated; P1, P2, P3, ..., Pn
(3) General hypotheses are added GP1, GP2, GP3, ..., GPn
(4) All hypotheses become INPUT to the "Black Box" of the Theory Generator
(5) Theoretical Conclusions are OUTPUT C1, C2, C3, ..., Cn

Dealing with the EVIDENCE is obviously absolutely critical in ancient history.
Arnaldo Momigliano puts it this way ...
"But I have good reason to distrust any historian who has nothing new to say or who produces novelties, either in facts or in interpretations, which I discover to be unreliable. Historians are supposed to be discoverers of truths. No doubt they must turn their research into some sort of story before being called historians. But their stories must be true stories. [...] History is no epic, history is no novel, history is no propaganda because in these literary genres control of the evidence is optional, not compulsory.
~ Arnaldo Momigliano, The rhetoric of history, Comparative Criticism, p. 260
Section 1: How Hypotheses about the evidence lead to Theoretical Conclusions.
1.0 The evidence
Evidence is diverse but its diversity may be broadly categorized into a general range of classifications as follows.
Categories of Ancient Historical Evidence
It should be kept in mind that the parts (1,2,3) below are not necessarily to be delineated, but it is often helpful (and often traditional) to examine the literature traditions and the field traditions as separate and independent sources of evidence. With the emergence of new scientific technologies, new Analytical Support tools are becoming abundant. This schema should therefore not be treated as necessarily complete, but as a DRAFT.
Part (1): The "Literature Traditions"
1.1 the speakers - authors (people, particularly "historians") and their estimable historicity.
1.2 the manuscripts - physical written source - original documents (codices, scrolls, papyri fragments)
1.3 the words - ancient texts: their literature, its scripts, its philology, and its translations.
Part (2): The "Field Traditions"
2.1 architecture, buildings, monuments
2.2 inscriptions in stone and metal and mosaic - the epigraphic habit
2.3 sarcophagi, burial relics, funerary ornaments
2.4 coins (gold, silver and others)
2.5 art, paintings and graffitti
2.6 sculpture, reliefs, frescoes, ornamental works
2.7 archeological relics and other citations
2.8 cadavers
2.9 geographical, climatic and ecological data (on a regional basis)
Part (3): The "Analysis Support Traditions & newer technologies"
3.1 paleographic assessment and dating of original texts, papyrii and papyrii fragments
3.2 radio carbon dating and other scientific dating citations
3.3 multi-spectral imaging and other scientific "reading" technologies
3.4 collective and collaborative databases: epigraphic, numismatic, geographic, climatic, etc.
3.9 the historians - comments and analyses of the above by past and present ancient historians.
Summary for discussion.
The evidence items are mute. They are relics and materials from antiquity. They do not speak. Even a textual story (with "eye-witness testimony") does not tell us whether it is fiction or history, or indeed a parody of a serious issue, or a serious issue. (Poe's Law). For this reason, people have to formulate hypotheses about what the evidence actually represents, about how the evidence is to be evaluated, etc. It is the series of hypotheses about the evidence which are being used to generate theories in ancient history.
If our hypotheses about the evidence are not correct, then the whole machinery becomes reflective of GIGO - garbage in garbage out.
Anyway that's something I put together some time ago but looks like it fits the discussion of the OP.
Criticisms are welcomed.