Why Does Lord Denning's Lead Balloon Intrigue Us Still? The Prospects of Finding a Unifying Principle for Duress, Undue Influence and Unconscionability
Bibliographic record
Abstract
To this day, Lord Denning’s opinion in Lloyds Bank v Bundy remains a staple of first-year Contracts courses in law faculties across the common law world. After surveying doctrines such as duress, undue influence, and unconscionable bargains, Denning posited that they were instances of an underlying principle permitting avoidance of a contract for “inequality of bargaining power”. Although rejected by the House of Lords, Denning’s proposition has intrigued Contract scholars for more than four decades. Subsequent attempts to “fix” Denning’s thesis have fallen short. Yet, authors of Contract textbooks persist in asking whether the doctrines might yet be unified in the future. This paper argues that a common principle indeed does exist, whose conditions emerge from careful analysis of the insights and flaws of the theories posited by Lord Denning and others following him. As Contract scholars have noted, recognising the common principle would greatly simplify and rationalise this area of law. It should permit a more principle-focused and consistent adjudication of cases where a party seeks to avoid a contract on the basis that its consent was vitiated by duress, undue influence, or unconscionability.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.008 | 0.019 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.008 | 0.025 |
| Scholarly communication | 0.008 | 0.010 |
| Open science | 0.002 | 0.003 |
| Research integrity | 0.012 | 0.018 |
| Insufficient payload (model declined to judge) | 0.004 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".