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arxiv: 2606.26530 · v1 · pith:LIDJ3SHAnew · submitted 2026-06-25 · 💻 cs.CL · cs.AI

textsc{DiARC}: Distinguishing Positive and Negative Samples Helps Improving ARC-like Reasoning Ability of Large Language Models

Pith reviewed 2026-06-26 05:30 UTC · model grok-4.3

classification 💻 cs.CL cs.AI
keywords ARClarge language modelspreference alignmentnegative samplesreasoningabstractiongrid tasks
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The pith

Distinguishing negative samples improves large language models on ARC-like grid reasoning tasks.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper claims that ARC-like problems, which require abstracting patterns from few grid examples, benefit from preference learning that teaches models to reject near-miss wrong answers as well as accept correct ones. DiARC builds such pairs in three ways: by applying visual changes to outputs, by inverting the underlying rules at the DSL level, and by editing task-specific rules, all while leaving the original input demonstrations untouched. These negative examples act as informative alternatives that sharpen the model's ability to separate valid from invalid reasoning paths. Experiments on several ARC-style benchmarks show consistent gains over models trained only on positive examples.

Core claim

ARC-like reasoning improves when models are trained not only on correct input-output pairs but also on preference pairs that contrast those correct pairs against three classes of constructed negatives: output-level visual transformations, DSL-level rule inversions, and task-specific rule edits. The negatives supply near-miss alternatives without altering the observed demonstrations, enabling the model to learn distinctions that positive supervision alone does not provide.

What carries the argument

Preference pairs formed from positive demonstrations and three types of negative samples (visual output transforms, DSL rule inversions, task-specific rule edits) that serve as near-miss contrasts for alignment training.

If this is right

  • Models learn to avoid specific classes of errors common in grid pattern prediction.
  • Reasoning gains occur while the original few-shot demonstrations remain unchanged.
  • The same construction methods apply across multiple ARC-style benchmarks with consistent effect.
  • Open-source models can close part of the gap to closed-source approaches without extra data augmentation.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same preference-pair idea might extend to other few-shot abstraction tasks that currently rely only on positive examples.
  • If the three negative-construction methods prove complementary, future work could combine them systematically rather than choosing one.
  • The approach suggests that explicit contrastive signals may be more efficient than scaling model size alone for this class of problems.

Load-bearing premise

The constructed negative samples function as useful near-misses that genuinely help the model separate good from bad reasoning rather than adding noise or confusion.

What would settle it

Train identical models on the same ARC-like data with and without the DiARC preference pairs; if accuracy on held-out tasks shows no reliable improvement when the pairs are included, the central claim does not hold.

Figures

Figures reproduced from arXiv: 2606.26530 by Feiyang Li, Yile Wang, Yuxuan Yang.

Figure 1
Figure 1. Figure 1: Schematic of ARC tasks and our method. (a) [PITH_FULL_IMAGE:figures/full_fig_p001_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: Examples of negative construction strategies for [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: Preference-learning pipeline. Given an ARC [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: Case study on ARC-AGI-1 task 31adaf00. search) methods, comparing how improvements in the underlying models propagate to final accuracy [PITH_FULL_IMAGE:figures/full_fig_p008_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: Cases on ARC-AGI-1, where the base model fails while we predict correctly. [PITH_FULL_IMAGE:figures/full_fig_p012_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: Cases on ARC-AGI-2,MiniARC, ConceptARC, 1D-ARC, and ARCcommunity, where the base model [PITH_FULL_IMAGE:figures/full_fig_p013_6.png] view at source ↗
Figure 7
Figure 7. Figure 7: Additional examples of output-level visual transformations. [PITH_FULL_IMAGE:figures/full_fig_p014_7.png] view at source ↗
Figure 8
Figure 8. Figure 8: Additional examples of output-level visual transformations. [PITH_FULL_IMAGE:figures/full_fig_p015_8.png] view at source ↗
Figure 9
Figure 9. Figure 9: Additional examples of DSL-level rule inversion. [PITH_FULL_IMAGE:figures/full_fig_p015_9.png] view at source ↗
Figure 10
Figure 10. Figure 10: Additional examples of DSL-level rule inversion. [PITH_FULL_IMAGE:figures/full_fig_p016_10.png] view at source ↗
Figure 11
Figure 11. Figure 11: Additional examples of task-specific rule editing. [PITH_FULL_IMAGE:figures/full_fig_p017_11.png] view at source ↗
Figure 12
Figure 12. Figure 12: Prompt template used for task-specific rule editing with GPT-5.4. [PITH_FULL_IMAGE:figures/full_fig_p018_12.png] view at source ↗
read the original abstract

The Abstraction and Reasoning Corpus (ARC;~\citealp{chollet2019measure}) contains tasks that require summarizing patterns from limited grid samples and predicting output grids. Recently, many large language model based approaches have attempted to transform it into a text-based reasoning task. However, methods based on open-source models have generally yielded unsatisfactory results, while those relying on closed-source models are too costly. Current efforts mainly focus on data augmentation, constructing ARC-like data for more comprehensive supervised fine-tuning. In this work, we argue that solving ARC-like problems requires not only \textit{positive} sample supervision but also the ability to improve model reasoning by distinguishing \textit{negative} samples. To this end, we draw on the idea of preference alignment and propose \textsc{DiARC}, a method that constructs preference pairs to enable the model to distinguish between them. Specifically, we propose three ways to construct negative samples, including output-level visual transformations, DSL-level rule inversion, and task-specific rule editing. The resulting negative samples provide informative near-miss alternatives while keeping the observed demonstrations unchanged. Experimental results across multiple ARC-like benchmarks show that \textsc{DiARC} consistently improves performance over baseline models. The code is released at https://github.com/szu-tera/DiARC.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 1 minor

Summary. The paper claims that ARC-like reasoning in LLMs requires distinguishing negative samples in addition to positive supervision, and introduces DiARC to construct preference pairs via three negative-sample methods (output-level visual transformations, DSL-level rule inversion, task-specific rule editing). These negatives are asserted to be informative near-miss alternatives that leave demonstrations unchanged, yielding consistent performance gains over baselines across ARC-like benchmarks, with code released.

Significance. If the results hold and the negatives function as near-misses that specifically improve reasoning distinctions, the work could meaningfully advance open-source LLM approaches to abstract reasoning tasks by moving beyond pure supervised fine-tuning and data augmentation, while addressing cost barriers of closed models. The public code release at https://github.com/szu-tera/DiARC is a clear strength for reproducibility.

major comments (2)
  1. [Abstract] Abstract: the assertion that the three negative-sample constructions 'provide informative near-miss alternatives' is central to the hypothesized mechanism but is presented without any supporting verification (e.g., similarity metrics, edit distances, or comparison against random negatives), leaving open whether gains arise from the claimed distinction process or from generic preference-tuning effects.
  2. [§4] §4 (experiments): the claim of 'consistent improvement' over baselines lacks reported statistical tests, precise baseline definitions, or ablations isolating each of the three negative-construction methods, so the load-bearing attribution to negative-sample distinction cannot be evaluated from the presented evidence.
minor comments (1)
  1. [Abstract] The specific ARC-like benchmarks used are referenced only generically in the abstract; §4 should explicitly list dataset names, sizes, and citations for reproducibility.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the constructive feedback. We address each major comment below and will revise the manuscript accordingly to strengthen the claims.

read point-by-point responses
  1. Referee: [Abstract] Abstract: the assertion that the three negative-sample constructions 'provide informative near-miss alternatives' is central to the hypothesized mechanism but is presented without any supporting verification (e.g., similarity metrics, edit distances, or comparison against random negatives), leaving open whether gains arise from the claimed distinction process or from generic preference-tuning effects.

    Authors: We agree that quantitative verification of the near-miss property would better support the central hypothesis. In the revision we will add similarity analyses (grid edit distances, DSL rule edit distances, and comparisons against randomly generated negatives) to demonstrate that the constructed negatives are systematically closer to the positives than random alternatives. revision: yes

  2. Referee: [§4] §4 (experiments): the claim of 'consistent improvement' over baselines lacks reported statistical tests, precise baseline definitions, or ablations isolating each of the three negative-construction methods, so the load-bearing attribution to negative-sample distinction cannot be evaluated from the presented evidence.

    Authors: We acknowledge that the current experimental section would benefit from greater rigor. The revised manuscript will report statistical significance tests with p-values, provide explicit definitions and implementation details for all baselines, and include ablation experiments that isolate the contribution of each of the three negative-sample construction methods. revision: yes

Circularity Check

0 steps flagged

No circularity; empirical method with independent experimental grounding

full rationale

The paper proposes three constructions for negative samples (output-level visual transformations, DSL-level rule inversion, task-specific rule editing) and reports empirical gains on ARC-like benchmarks via preference alignment. No equations, fitted parameters, or derivations appear in the provided text. The central claim rests on external benchmark comparisons rather than any quantity defined by the method itself. No self-citation chains, uniqueness theorems, or ansatzes are invoked to force the result. The derivation chain is self-contained against external data.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The central claim rests on the domain assumption that preference alignment with the described near-miss negatives will improve reasoning; no free parameters or new entities are introduced in the abstract.

axioms (1)
  • domain assumption Preference alignment on positive and negative output pairs improves model reasoning on ARC-like tasks
    The paper draws directly on the idea of preference alignment to motivate DiARC.

pith-pipeline@v0.9.1-grok · 5769 in / 1221 out tokens · 35875 ms · 2026-06-26T05:30:34.664701+00:00 · methodology

discussion (0)

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