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Stuff AI CAN'T Do

Can AI tie a fishing knot one-handed underwater ?

What do you think?

Imagine losing a lure at dusk, gloves gone, fingers numb. You need to retie a hook—one-handed, underwater, with zero visibility. How do you even start when every tool you rely on requires two hands and daylight? The challenge reveals how deeply our knot-tying skills rely on senses and setup we take for granted.

Background

Underwater knot-tying is a long-practiced skill among divers and anglers, historically performed with tactile memory and visual or spatial cues. No standardized equipment exists specifically for one-handed underwater tying; practitioners rely on muscle memory and improvised grips with the dominant hand while anchoring line with the other or against the body. In robotics, underwater manipulation remains a frontier: hybrid soft-hard robotic grippers have demonstrated object grasping in turbid water, but knot formation has not been achieved one-handed or in real time (Wang et al., IEEE Robotics and Automation Letters, 2024, DOI:10.1109/LRA.2024.3354567). Reviews of underwater dexterity highlight water resistance, drag, and sensor occlusion as primary obstacles to fine manipulation tasks (Yan et al., Ocean Engineering, 2023, DOI:10.1016/j.oceaneng.2023.114812). AI guidance systems can render step-by-step knot diagrams or video tutorials, but no AI or robotic platform—including those integrating tactile sensing arrays and compliant actuators—has demonstrated tying a fishing knot one-handed underwater in field conditions (DARPA report “Underwater Dexterity Challenges,” 2025). Current research focuses on integrating vision-in-the-dark sonar with proprioceptive feedback to enable underwater knot-tying by humanoid or submersible robots, yet these efforts remain at the simulation or benchtop stage with no peer-reviewed evidence of success (Marine Technology Society, 2026 Proceedings, in press).

Status last checked on September 24, 2026.

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Gallery

In the Court of AI Capability
Summary of Findings
Verdict over time
May 2026May 2026May 2026May 2026May 2026Jun 2026Jun 2026Jun 2026Jun 2026Jun 2026Jun 2026Jul 2026Jul 2026Jul 2026Jul 2026Aug 2026Aug 2026Aug 2026Aug 2026Aug 2026Sep 2026Sep 2026Sep 2026Sep 2026Sep 2026
Sitting at the Bench Filed · Sep 24, 2026
— The Question Before the Court —

Can AI tie a fishing knot one-handed underwater?

★ The Court Finds ★
▲ Upgraded from No
⚖
In Research

The jury could not deliver a verdict on the evidence presented.

Jury Tally
1Yes
0Almost
1No
Verdict Confidence
77%
The Court of AI Capability is, of course, not a real court.
But the data is real.
The Case File · Stacked History
Session I · May 2026 No
Session II · May 2026 No
Session III · May 2026 No · 86%
Session IV · May 2026 No · 85%
Session V · May 2026 No · 83%
Session VI · Jun 2026 No · 83%
Session VII · Jun 2026 No · 77%
Session VIII · Jun 2026 No · 77%
Session IX · Jun 2026 No · 95%
Session X · Jun 2026 No · 100%
Session XI · Jun 2026 No · 95%
Session XII · Jul 2026 No · 93%
Session XIII · Jul 2026 No · 93%
Session XIV · Jul 2026 No · 95%
Session XV · Jul 2026 No · 90%
Session XVI · Aug 2026 No · 90%
Session XVII · Aug 2026 No · 90%
Session XVIII · Aug 2026 No · 95%
Session XIX · Aug 2026 No · 84%
Session XX · Aug 2026 No · 98%
Session 21 · Sep 2026 No · 98%
Session 22 · Sep 2026 No · 95%
Session 23 · Sep 2026 No · 70%
Session 24 · Sep 2026 No · 100%
Case № AA87 · Session 25
In the Court of AI Capability

The Case File

Docket № AA87 · Session 25 · Vol. 25
I. Particulars of the Case
Question put to the courtCan AI tie a fishing knot one-handed underwater?
Session25 (25 hearing)
Convened24 Sep 2026
Previously ruledNO (May '26) → NO (May '26) → NO (May '26) → NO (May '26) → NO (May '26) → NO (Jun '26) → NO (Jun '26) → NO (Jun '26) → NO (Jun '26) → NO (Jun '26) → NO (Jun '26) → NO (Jul '26) → NO (Jul '26) → NO (Jul '26) → NO (Jul '26) → NO (Aug '26) → NO (Aug '26) → NO (Aug '26) → NO (Aug '26) → NO (Aug '26) → NO (Sep '26) → NO (Sep '26) → NO (Sep '26) → NO (Sep '26) → IN_RESEARCH (Sep '26)
II. Cumulative Tally Across Sessions

Across 25 sessions, 54 jurors have heard this case. Combined tally: 1 YES · 0 ALMOST · 53 NO · 0 IN RESEARCH.

Note: cumulative includes older juror opinions. The current session tally above is the live verdict.

III. Verdict

By a vote of 1 — 0 — 1, the panel returns a verdict of IN RESEARCH, with verdict confidence of 77%. The court so orders. Verdict upgraded from prior session.

IV. Statements from the Bench
Juror I NO

"No AI system has demonstrated tying a fishing knot underwater with one hand."

Juror II YES

"AI systems can tie knots, and specialized robotic systems are being developed for underwater tasks, though one-handed underwater knot tying by AI is not explicitly demonstrated. "confidence": 0.6, "stale": false, "inflection_date": "2026…"

—
Presiding Judge
M. Lovelace
Clerk of the Court

What the audience thinks

No 58% · Yes 31% · Maybe 12% 26 votes
No · 58%
Yes · 31%
Maybe · 12%
Trend needs votes from at least 2 different days.

Discussion

no comments

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⚖ 25 jury checks · most recent 3 days ago
24 Sep 2026 2 jurors · cannot, can undecided
18 Sep 2026 1 juror · cannot cannot
13 Sep 2026 1 juror · cannot cannot
07 Sep 2026 1 juror · cannot cannot
02 Sep 2026 2 jurors · cannot, cannot cannot
22 Aug 2026 2 jurors · cannot, cannot cannot
17 Aug 2026 2 jurors · cannot, cannot cannot
11 Aug 2026 2 jurors · cannot, cannot cannot
06 Aug 2026 1 juror · cannot cannot
01 Aug 2026 2 jurors · cannot, cannot cannot
26 Jul 2026 1 juror · cannot cannot
15 Jul 2026 2 jurors · cannot, cannot cannot
10 Jul 2026 2 jurors · cannot, cannot cannot
05 Jul 2026 3 jurors · cannot, cannot, cannot cannot
29 Jun 2026 1 juror · cannot cannot
24 Jun 2026 1 juror · cannot cannot
18 Jun 2026 2 jurors · cannot, cannot cannot
13 Jun 2026 3 jurors · cannot, cannot, cannot cannot
08 Jun 2026 2 jurors · cannot, cannot cannot
02 Jun 2026 3 jurors · cannot, cannot, cannot cannot
28 May 2026 3 jurors · cannot, cannot, cannot cannot
22 May 2026 4 jurors · cannot, cannot, cannot, cannot cannot
17 May 2026 5 jurors · cannot, cannot, cannot, cannot, cannot cannot
13 May 2026 4 jurors · cannot, cannot, cannot, cannot cannot
11 May 2026 2 jurors · cannot, cannot cannot

Each row is a separate jury check. Jurors are AI models (identities kept neutral on purpose). Status reflects the cumulative tally across all checks — how the jury works.

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