Science is supposed to work by trying to disprove ideas. In practice, researchers fall in love with their own theories and spend careers defending them. So something genuinely rare happened in the study of consciousness: two rival camps sat down together, before collecting any data, and agreed on which experimental results would count against each of them.
The two contenders
In one corner, Integrated Information Theory (IIT) — the idea that consciousness lives wherever information is densely woven together, with the back of the brain doing the heavy lifting. In the other, Global Workspace Theory — the idea that you’re conscious of something when the brain “broadcasts” it widely, especially through the front of the brain, like a fact suddenly posted to a company-wide channel.
These make different bets about where and when conscious experience shows up in the brain. That’s testable.
The honest part: nobody clearly won
The collaboration ran the agreed experiments and reported the results openly — including the parts that embarrassed both sides. Some predictions held up; others didn’t. IIT’s emphasis on the back of the brain got support in places, but the sustained activity it predicted wasn’t all there. Global Workspace Theory’s front-of-brain broadcasting showed up less cleanly than expected.
No knockout. And that’s the point. Instead of two groups each declaring victory in separate papers, everyone agreed in advance what the scoreboard was — so the messy, inconclusive result is actually trustworthy.
The 25-year bet
The backdrop to all this is a famous wager. In 1998, philosopher David Chalmers bet neuroscientist Christof Koch that within 25 years we still wouldn’t have pinned down a clear neural signature of consciousness. The stakes: a case of fine wine. In 2023, Koch conceded and paid up — the mechanism is still elusive.
Consciousness remains the rare scientific problem where we can’t yet agree on what would even count as solving it. Which is exactly why an experiment designed to make its own architects lose is such a big deal.