The Bridge Trap: Why Mind-Merging Technology Cannot Solve the Problem of Other Minds

David Pearce proposes that reversible thalamic bridges will one day permit mind-melding between subjects and so lay the problem of other minds to rest. William Hirstein argues on independent grounds that direct access to another person's conscious states ("mindmelding") is possible and that the privacy of consciousness is a dispensable dogma. The craniopagus Hogan twins, joined by a functioning thalamic bridge, and the existing brain-to-brain interface literature are offered as early evidence. This paper argues that no bridge, at any bandwidth, can solve the problem of other minds, and that the attempt manufactures worse problems than the one it targets. The core argument is a dilemma. To the extent two bridged parties remain distinct, neither can verify that the other feels, because every signal arrives inside a single phenomenal field. To the extent they merge, the bridge has not verified an other mind but produced a third one, and a reversible bridge is by construction a mechanism for ending that third subject over its own objection. Between the horns, four further failures follow: any instrument that can confirm suffering can deny it, compulsory neural correlation replaces empathy as a moral act with empathy as an enforced state, the proposal inherits externalism's structure of making suffering secondary to measurement, and the boundary it dissolves is the very thing that makes other minds morally inviolable. Experiential Empiricism's treatment of other minds is defended as the stronger position precisely because it treats the epistemic limit as a protective boundary rather than an engineering defect.