“But the citation seems to indicate that he won it for inventing back-propagation, but, well, he didn’t.”
Our reading:
Hinton did not invent back-propagation, even though the Nobel citation seems to say he won for it.
Assessment: Supported
What happened
Was it true for the period described?
Outcome: Supported
The evidence matches what they said.
Judged on a plain reading. They named no measure, so we used the reading a typical informed reader would take. It is spelled out under “How we judged it”.
Evidence up to . Checked .
Why
The unqualified assertion that Hinton did not originate back-propagation is supported. The Nobel scientific background calls the 1986 work a reinvention, and Hinton himself is reported as rejecting invention credit. This finding does not endorse Marcus's tentative interpretation of the citation. The official announcement foregrounds the Boltzmann machine, and its scientific background acknowledges earlier work.
Caveats
- The outcome applies only to the categorical denial of original invention.
- It does not deny Hinton's substantial contributions or assign sole priority to another researcher.
- Hinton's explicit denial is quoted through a news report.
Evidence (3 items)
Supports the claim: Royal Swedish Academy of Sciences,
Rumelhart, Hinton and Williams reinvented a scheme for this, which had previously been applied to related problems by others [26,27].
Why it matters: The Nobel scientific background describes the 1986 contribution as reinvention of an existing scheme. This supports the denial of original priority while preserving credit for subsequent contributions.
- Publisher
- Royal Swedish Academy of Sciences
- Kind of source
- Secondary summary
- About events on
- Published
Supports the claim: Synced,
I’ve seen things in the press that say that I invented backpropagation, and that is completely wrong.
Why it matters: The report quotes Hinton explicitly rejecting invention credit. This corroborates the historical account; it is a reported statement because the original discussion was inaccessible.
- Publisher
- Synced
- Kind of source
- News report
- About events on
- Published
Context only: Royal Swedish Academy of Sciences,
Geoffrey Hinton used the Hopfield network as the foundation for a new network that uses a different method: the Boltzmann machine.
Why it matters: The official announcement foregrounds the Boltzmann machine. This limits any inference that the award announcement credited Hinton with inventing back-propagation, but Marcus's tentative impression is not scored.
- Publisher
- Royal Swedish Academy of Sciences
- Kind of source
- Company disclosure: the company describing itself, not an independent finding
- About events on
- Published
How we judged it
- Kind of claim
- Observation
- Deadline
- None given. We don’t add one.
Where we had to interpret
- The categorical assertion is that Hinton did not invent back-propagation. In context, inventing means originating the method, rather than subsequently developing, demonstrating or popularising it.
- The words 'seems to indicate' qualify Marcus's interpretation of the Nobel citation. That impression is not scored as a categorical assertion about what the citation says.
- The assessment covers historical priority through the post date. The claim supplies no starting date.
Right if: Reliable historical records establish that back-propagation existed before Hinton's contribution, or establish that his contribution was a rediscovery or development of an existing method.
Wrong if: Reliable historical records establish Hinton's original priority for back-propagation. Evidence that he made important subsequent contributions would not suffice.
We wrote this test after the outcome was known.
We found 9 claims in this post. See them all.
Full record
Source and dates
Marcus on AI, Two Nobel Prizes for AI, and Two Paths Forward, paragraph 4.
- Said
- We read the source
- live page, full text, public
- Evidence up to
- Checked
We read this wording on 2026-10-28. The post may have been edited after 2024-10-09.
Where it was said (1)
Said once in the posts we read.
: Marcus on AI, Two Nobel Prizes for AI, and Two Paths Forward
But the citation seems to indicate that he won it for inventing back-propagation, but, well, he didn’t.
- Where
- paragraph 4
- Published
- 2024-10-09
- We read it
- , live page
- Access
- full text, public
History
Versions
- Current: Supported. Evidence up to 2026-10-28.
What happened to this record
PublishedBy us
Published after both AI reviews and the final check passed.
Held backBy us
A reviewer said our test wasn’t fair to what was actually said.