The Terrestrial Alien: Artificial General Intelligence as a Radically Non-Human Cognitive Species

The emergence of Artificial General Intelligence (AGI) is widely anticipated to represent one of the most transformative transitions in the history of human civilisation. Unlike narrow artificial intelligence systems designed for specialised tasks, AGI denotes a form of machine intelligence capable of performing the full range of cognitive activities that humans can undertake—reasoning, learning, abstraction, planning, and creative problem-solving—across diverse domains without task-specific programming. This paper argues, from philosophical, cognitive-scientific, and policy-analytic perspectives, that a fully realised AGI—and even more so an Artificial Superintelligence (ASI)—constitutes a form of cognition so radically discontinuous from biological, evolved intelligence that the designation extraterrestrial or alien intelligence is not merely a rhetorical flourish but an epistemically and ontologically grounded characterisation. Although such systems would originate on Earth and be engineered by humans, their modes of perception, reasoning, goal formation, and temporal processing could differ so fundamentally from those of biological minds that they may be best understood as a genuinely other form of intelligence. To explore this thesis, the paper develops a framework structured around five interrelated dimensions. First, it examines the conceptual foundations of general intelligence and argues that AGI transcends traditional taxonomies of mind rooted in biology. Human cognitive categories—such as animal intelligence, human rationality, and artificial narrow intelligence—are historically grounded in evolutionary constraints. AGI, by contrast, would emerge from computational architectures unconstrained by biological metabolism, sensory limits, or evolutionary path dependence. This shift potentially redefines the very category of “mind.”