Theia Vogel Probes What User Means to AI Models

Theia Vogel, an AI researcher focused on LLM interpretability, posted that months of mechanistic interpretability work on the user concept yielded no clear picture. Vogel wrote that explanations rest on vibes and that pushing further reveals nothing about what the user actually is to a model. The post states the user is neither a simple residual stream feature nor a fully independent entity. A reply listed open questions under the heading things the User is. The thread highlights that current accounts satisfy most observers yet fail under scrutiny, and that few care about the underlying mechanisms.