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arxiv: 1910.13461 · v1 · submitted 2019-10-29 · 💻 cs.CL · cs.LG· stat.ML

Recognition: 3 theorem links

· Lean Theorem

BART: Denoising Sequence-to-Sequence Pre-training for Natural Language Generation, Translation, and Comprehension

Mike Lewis , Yinhan Liu , Naman Goyal , Marjan Ghazvininejad , Abdelrahman Mohamed , Omer Levy , Ves Stoyanov , Luke Zettlemoyer
Authors on Pith no claims yet

Pith reviewed 2026-05-13 00:10 UTC · model grok-4.3

classification 💻 cs.CL cs.LGstat.ML
keywords BARTdenoising autoencodersequence-to-sequence pretrainingtext generationabstractive summarizationquestion answeringmachine translation
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The pith

BART pretrains sequence-to-sequence models by corrupting text with noise and reconstructing the original, reaching new state-of-the-art results on generation and comprehension benchmarks.

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

The paper presents BART as a denoising autoencoder that pretrains Transformer-based sequence-to-sequence models. It applies arbitrary text corruptions such as sentence shuffling and span infilling, then trains the model to recover the clean original text. This single framework combines the bidirectional encoding of BERT with the left-to-right decoding of GPT. When fine-tuned, the resulting models set new records on abstractive summarization, dialogue generation, and question answering while matching strong baselines on classification and extraction tasks.

Core claim

BART is trained by corrupting text with an arbitrary noising function and learning a model to reconstruct the original text. It uses a standard Transformer encoder-decoder architecture that generalizes prior pretraining schemes, with the best results obtained by combining sentence shuffling and a novel span-infilling scheme.

What carries the argument

Denoising autoencoder that corrupts input with sentence permutation plus span masking and reconstructs the original via a bidirectional encoder plus autoregressive decoder.

Load-bearing premise

The specific choice of sentence shuffling combined with span infilling yields representations that transfer better to downstream generation and comprehension than earlier noising schemes.

What would settle it

A replication experiment that trains the identical architecture and data on GLUE, SQuAD, and CNN/DM but replaces the shuffling-plus-infilling corruption with a single prior scheme such as token masking alone, and measures whether the ROUGE and accuracy gaps disappear.

read the original abstract

We present BART, a denoising autoencoder for pretraining sequence-to-sequence models. BART is trained by (1) corrupting text with an arbitrary noising function, and (2) learning a model to reconstruct the original text. It uses a standard Tranformer-based neural machine translation architecture which, despite its simplicity, can be seen as generalizing BERT (due to the bidirectional encoder), GPT (with the left-to-right decoder), and many other more recent pretraining schemes. We evaluate a number of noising approaches, finding the best performance by both randomly shuffling the order of the original sentences and using a novel in-filling scheme, where spans of text are replaced with a single mask token. BART is particularly effective when fine tuned for text generation but also works well for comprehension tasks. It matches the performance of RoBERTa with comparable training resources on GLUE and SQuAD, achieves new state-of-the-art results on a range of abstractive dialogue, question answering, and summarization tasks, with gains of up to 6 ROUGE. BART also provides a 1.1 BLEU increase over a back-translation system for machine translation, with only target language pretraining. We also report ablation experiments that replicate other pretraining schemes within the BART framework, to better measure which factors most influence end-task performance.

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

0 major / 2 minor

Summary. The manuscript presents BART, a denoising autoencoder for pre-training sequence-to-sequence models. The approach corrupts input text using an arbitrary noising function and trains a standard Transformer encoder-decoder to reconstruct the original text. The authors evaluate multiple noising strategies, finding that sentence permutation combined with span infilling performs best, and show that the resulting model transfers effectively to both generation and comprehension tasks, matching RoBERTa on GLUE and SQuAD while achieving new state-of-the-art results on abstractive summarization, dialogue, and QA benchmarks (gains up to 6 ROUGE) as well as a 1.1 BLEU improvement on machine translation with target-only pre-training. Ablation experiments replicate prior pre-training schemes inside the BART framework to isolate contributing factors.

Significance. If the empirical results hold, the work supplies a simple, unified pre-training recipe that generalizes bidirectional (BERT-style) and autoregressive (GPT-style) objectives through denoising. The direct ablations comparing noising variants on identical architecture and the consistent downstream gains on independent held-out benchmarks (GLUE, SQuAD, ROUGE on summarization corpora) constitute a clear strength, offering both practical utility for generation tasks and diagnostic insight into which pre-training components matter most.

minor comments (2)
  1. [Abstract] Abstract: the statement that BART 'achieves new state-of-the-art results on a range of abstractive dialogue, question answering, and summarization tasks, with gains of up to 6 ROUGE' would be more precise if it named the specific datasets and the strongest prior baselines for each task.
  2. [Section 3 (Noising Strategies)] The description of the span-infilling noising scheme (replacing spans with a single mask token) would benefit from an explicit statement of the length distribution used during pre-training, as this hyper-parameter is listed among the free choices in the method.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for their positive assessment of our work and their recommendation to accept the manuscript. We are pleased that the referee recognizes the value of BART as a unified denoising pre-training approach that generalizes bidirectional and autoregressive objectives, along with the strength of our ablation studies and consistent empirical gains across benchmarks.

Circularity Check

0 steps flagged

No significant circularity identified

full rationale

The BART paper describes an empirical pretraining procedure (corrupt text via noising functions then reconstruct) and evaluates it through ablations and fine-tuning on independent downstream benchmarks (GLUE, SQuAD, summarization ROUGE, dialogue, MT BLEU). No equations, predictions, or first-principles claims reduce by construction to the inputs; the reported gains are measured on held-out task data separate from the pretraining corpus and noising choices. Self-citations are limited to prior work on related models and do not serve as load-bearing uniqueness theorems. The argument is explicitly experimental and self-contained against external metrics.

Axiom & Free-Parameter Ledger

2 free parameters · 1 axioms · 0 invented entities

This is an empirical pretraining paper. The central claims rest on experimental outcomes rather than closed-form derivations. Free parameters are the concrete noising probabilities and span lengths selected via ablation; the transformer architecture and optimization are taken from prior literature.

free parameters (2)
  • span infilling length distribution
    Lengths and replacement probabilities chosen through ablation to maximize downstream task performance.
  • sentence permutation rate
    Rate selected as part of the best-performing noising scheme identified in experiments.
axioms (1)
  • domain assumption A standard transformer encoder-decoder can serve as a denoising autoencoder for arbitrary text corruptions.
    Invoked when the paper states that the NMT architecture generalizes BERT and GPT.

pith-pipeline@v0.9.0 · 5582 in / 1433 out tokens · 63631 ms · 2026-05-13T00:10:32.124054+00:00 · methodology

discussion (0)

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