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You cannot guarantee that an AI system will never invent a detail, but you can make document extraction evidence-bound: require each value to point to a source location, return an explicit unknown when support is missing or unclear, and check consequential results against the document. A polished answer is not proof that it is correct.
Make every extracted value answerable to the document
Define the fields you need and their expected types, then instruct the system to use only the supplied document as evidence—not general knowledge. Tell it to return an explicit unknown or empty state when a field is absent, unreadable, or ambiguous. This is a workflow safeguard, not a guarantee that a model will follow the instruction perfectly.
Keep provenance beside each value: a page number, section, text span, or coordinates that let a reviewer locate the supporting passage. Microsoft describes source references and spans for checking extracted output against a PDF in its document analysis documentation. Exact features depend on the product and API version, so check the current documentation before choosing an implementation.
Verify that the source supports the value
Check the cited passage and surrounding context, not just whether the output is valid JSON or includes a confidence score. Neither a well-formed response nor a high confidence value establishes that a claim is true. Ask whether the source supports the value as stated, whether relevant context was omitted, and whether the evidence is sufficient. NIST describes these as distinct grounding dimensions: faithfulness, completeness, and sufficiency (NIST’s grounding evaluation guidance).
The Tool Desk
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
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- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Microsoft Support puts the practical rule plainly: “If a statement can’t be traced back to a source, treat it as unconfirmed until verified.” Check names, dates, numbers, quotations, citations, and any other consequential fields against authoritative source material. The Commons Library likewise advises careful checking, ideally with an expert, when using AI-generated content (Commons Library guidance).
Route uncertainty and high-impact fields to review
Make uncertainty a defined workflow state rather than an invitation to guess. Send missing, unreadable, ambiguous, contradictory, or unsupported values for review, and show the reviewer the original document beside the extracted result. Microsoft describes this approach as supporting human-in-the-loop validation (Microsoft document analysis guidance).
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
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- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Set review rules based on the consequences of an error, the uncertainty of the evidence, and performance on representative documents. There is no universal threshold in the cited guidance for when human review can safely be skipped. Government guidance warns that generative AI outputs are “statistically informed guesses rather than facts” and recommends documenting data sources and how a conclusion was generated (UK Government guidance on generative AI). The ICO also advises developers to assess and communicate the risks and impacts of inaccuracies (ICO guidance on AI risks).
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Test the whole extraction workflow
Evaluate with documents representative of the formats, layouts, languages, and conditions you actually process. Track more than invented values: omissions, transcription errors, lost context, and incorrect handling of uncertainty can also make an extraction unreliable. AWS recommends defining the veracity issues relevant to the use case and applying filters and verification (AWS guidance on mitigating hallucinations).
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
When selecting a tool or designing a process, check whether it provides:
- A verifiable source location for each output value.
- A way to flag missing or low-confidence fields rather than fill them in.
- Support for the document formats, layouts, and languages in your workload.
- A side-by-side view of source and extracted result for reviewers.
- Evaluation of both false values and omissions.
- Auditability, access controls, and versioning appropriate to the documents.
Grounding makes errors easier to detect; it does not prove an extraction is correct. Reviewers must still judge whether the cited evidence supports the value and whether the output has lost important context. The sources cited here establish no universal hallucination rate for document extraction or percentage improvement from a particular control.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
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