Thanks, James. This is a very helpful challenge, and I agree that our wording was too strong.
We are not proposing a general conversion between energy expenditure and Pain intensity. The hypothetical linear relationship you describe would make the problem much easier, but there is currently no reason to assume that the relationship is linear, universal, or even implemented similarly across species. Although human studies find some associations between reported Pain intensity and patterns of neural activation, that does not give us a cross-species calibration rule.
Neuroenergetic evidence would therefore be only one indirect line of evidence. Greater energy use could reflect stronger affective intensity, but it could also reflect finer resolution, inhibitory modulation, general arousal, motor preparation, or other processing demands. Its interpretation would depend heavily on the architecture involved.
I agree that the most promising use may be in carefully controlled comparisons between closely related organisms with similar neural organization. Even there, however, the conclusion would be that the evidence is more or less consistent with a higher affective ceiling, not that a given amount of energy corresponds to a particular Pain intensity.
So I would revise our claim from “help determine whether primitive nervous systems can support high-intensity Pain” to “help constrain hypotheses about whether they can support it.” Thanks for pinpointing that distinction.
Update, August 2026: We have revised the title and some terminology in this post to place greater emphasis on the Affective Ceiling Approach, which is the underlying scientific contribution, rather than on its current implementation as a Custom GPT. We have also renamed the tool the Affective Ceiling GPT.
These are changes in framing and naming. They do not alter the post’s substantive claims, evidence, reasoning or conclusions.
The Custom GPT is an experimental and temporary way of making the approach available. The Affective Ceiling Approach is independent of that particular platform and can be applied by researchers directly or implemented through other, more capable tools as they are developed.