The Role of Stimulants like Caffeine in Triggering or Amplifying Intuitive Gut Feelings and Premonitory Experiences: A Salience-Gain and Interoceptive Threshold Hypothesis

This paper proposes, rather than claims to demonstrate, that intuitive gut feelings and premonitory experiences are a universal human baseline: everyone has them, though people differ in how often they notice them [1–4]. Stimulants such as caffeine are treated as visibility amplifiers, not as creators of a special faculty. The primary hypothesis is that an acute moderate-to-high dose of caffeine—acting via central adenosine $A_1$ and $A_{2A}$ receptor antagonism [7, 8]—increases subjective gain in the dorsal anterior cingulate cortex (dACC) and the anterior insula (AIC) [5, 6], raising the likelihood that suppressed or low-intensity intuitive threat signals—already present in ordinary human cognition—will cross the perceptual threshold into conscious awareness. The proposal is motivated by a longitudinal case observation: unexplained warnings to stay away from certain people were later followed by those people encountering danger, including a colleague who died in an accident; the feelings faded for years and returned, after a high caffeine dose, in connection with an elderly neighbor. An evolutionary reading treats these signals as conserved survival tools, once relied on in prehistoric hunting and social threat detection, and now dulled by chronic stress, poor sleep [11, 12], social media, and cognitive offloading to artificial intelligence (AI) [14, 15]. A further, speculative concern is that unused neural pathways can weaken with disuse through experience-dependent synaptic plasticity and, over generations, could fade from skilled cultural use or relaxed selection. A parallel is drawn with the apparent outsourcing of human creativity and critical judgment to social media templates and AI [14, 15]. A prospective, counterbalanced, 14-day within-person self-logging study ($N = 80$ across two baseline-noticing strata) is outlined to test the amplifier claim using Signal Detection Theory ($d'$ sensitivity versus criterion $c$). Cognitive biases and the ethical risk of acting on false alarms are discussed. The conclusion is a call to notice and preserve these interoceptive capacities before people become permanently dependent on external pharmacological or algorithmic triggers to feel them at all.