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Search Engines in an AI Era: The False Promise of Factual and Verifiable Source-Cited Responses

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arxiv 2410.22349 v1 pith:THHFT3ZE submitted 2024-10-15 cs.IR cs.AIcs.CLcs.CYcs.HC

Search Engines in an AI Era: The False Promise of Factual and Verifiable Source-Cited Responses

classification cs.IR cs.AIcs.CLcs.CYcs.HC
keywords answerenginessearchengineevaluationlimitationsapplicationsinsights
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Large Language Model (LLM)-based applications are graduating from research prototypes to products serving millions of users, influencing how people write and consume information. A prominent example is the appearance of Answer Engines: LLM-based generative search engines supplanting traditional search engines. Answer engines not only retrieve relevant sources to a user query but synthesize answer summaries that cite the sources. To understand these systems' limitations, we first conducted a study with 21 participants, evaluating interactions with answer vs. traditional search engines and identifying 16 answer engine limitations. From these insights, we propose 16 answer engine design recommendations, linked to 8 metrics. An automated evaluation implementing our metrics on three popular engines (You.com, Perplexity.ai, BingChat) quantifies common limitations (e.g., frequent hallucination, inaccurate citation) and unique features (e.g., variation in answer confidence), with results mirroring user study insights. We release our Answer Engine Evaluation benchmark (AEE) to facilitate transparent evaluation of LLM-based applications.

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Synthetic Sources?: Auditing Generative Search Engine Citations for Evidence of AI-Generated Sources

    cs.IR 2026-05 unverdicted novelty 6.0

    Audit of ChatGPT, Copilot, Gemini and Perplexity finds ~16% of cited sources are AI-generated across 712 queries on politics, health and environment.

  2. Measuring Google AI Overviews: Activation, Source Quality, Claim Fidelity, and Publisher Impact

    cs.CY 2026-05 unverdicted novelty 6.0

    Google AI Overviews activate on 13.7% of queries overall and 64.7% of questions, cite more credible sources than standard results but omit key information in 11% of claims, and suppress clicks on over half of cited pa...

  3. From Citation Selection to Citation Absorption: A Measurement Framework for Generative Engine Optimization Across AI Search Platforms

    cs.IR 2026-04 unverdicted novelty 6.0

    A measurement study of 602 prompts across ChatGPT, Google AI Overview, and Perplexity finds that citation selection breadth and absorption depth diverge, with high-influence pages being longer, structured, and evidence-rich.

  4. Attribution Gradients: Incrementally Unfolding Citations for Critical Examination of Attributed AI Answers

    cs.HC 2025-10 unverdicted novelty 6.0

    Attribution gradients consolidate citation evidence and enable incremental unfolding of secondary sources, leading to deeper engagement in a lab study of critical reading tasks for AI answers.

  5. LLMs Get Lost In Multi-Turn Conversation

    cs.CL 2025-05 unverdicted novelty 6.0

    LLMs drop 39% in performance during multi-turn conversations due to premature assumptions and inability to recover from early errors.