This article presents four long-range reconnaissance protocols for interuniversal expeditions within the Infinite-Dimensional Multiverse Model (IDM). The protocols are built on an escalation principle: from passive observation to isolation upon confirmation of intelligence. The first protocol — "Blind Witness" — applies during initial entry into an unknown universe. Its name is not accidental but reflects an epistemological principle: we collect data but do not interpret it or interfere with the environment. This protects against errors similar to the pulsar discovery, where natural signals were mistaken for intelligent ones. The second protocol — "Stranger" — activates when anomalies are detected. Its task is to verify whether observed signals are natural or artificial. It employs double-checking, correlation analysis, and, as a last resort, a minimal active test. The third protocol — "Doubt" — applies when intelligence is suspected but not conclusively proven. Verification uses three criteria: structuredness, purposefulness, and consistency of signals. The criteria are used together, as natural processes can mimic individual signs of intelligence. The fourth protocol — "Sanatorium" — comes into effect when intelligence is confirmed. The probe enters full isolation and passive monitoring mode, with no active signals or approach. For preatomic universes, additional protocols are developed: "Absolute Silence," "Blind Spot," vacuum monitoring, and preatomic-level quarantine. The protocols do not provide guarantees but create a framework for decision-making under conditions of radical uncertainty.
Alexander Yourievitch Kotelnikov (Fri,) studied this question.