Key hypothesis: •ncRNA is the digital basis for advanced memory and intelligence.This seeds further hypotheses which together offer a plausible bio-mechanistic model based on Piaget’s abstractions. These included: •Optical intercommunication (hence •getting myelinated fibres to double-task as coaxial cable — since demonstrated by others). •Mechanistic bases for Piaget’s ‘stages.’ •The physical ‘schéma’ nature of a concept. •a virus-sized ‘capsid’ can contain many schémas, &/or •Many linked optically to distant sites, aided by digital addresses. — Optical messages, so •partially cable-free (‘radiolike’), and having •some choice of route (like the internet); meanwhile •synaptic Hebbian route-improvement maintains efficiency. — •Essential RNA action-codes are transcribed directly from DNA. •Other codes are constructed by rapid-Darwinian trial-and-error from “junk” inherited RNA fragments, sometimes with •intelligence-guidance from a higher Piagetian meta-level. — •New explanation for ‘gut intelligence’ sees exotic junk-RNA (carried by axon-transport) offering greater Darwinian-diversity in the hippocampus. •New concepts/RNA-structures are carried physically-whole from hippocampus to cortex (impossible with any synapse-memory model). — There is actually a solid forensic detective-work origin for these postulates (based on published findings in various disciplines). At this stage however, it seems best to treat them provisionally as mere guesses, and challenge them experimentally where possible.

Modelling human intelligence? Hyland identified three approaches: •Physiological, •Mentalistic (as if outside 3D space), and •Mechanistic. Arguably their apparent incompatibility arises from a mistaken choice of scale, centred on the synapse as a basic unit for thought. Instead RNA-codons are now proposed as those fundamental elements (cf. Hydén’s forgotten 1960s findings). This also seems compatible with both (i) information-technology’s digitisation, and (ii) Piaget’s concepts of “schèmes,” and developmental stages. For the more-complex code-structures (“schémata”) needed for higher Piagetian stages, their necessary physical configuration is then considered — packable into virus-like “boxes” (capsids —typically 125nm diameter). These could be free to relocate into cortex-“archives” — either within Rakic’s migratory new-neurons, or the bloodstream! Such ultra-miniaturisation needs to communicate by INFRA-RED signals — via myelin coaxial cables, but also somewhat free to operate radio-like, dependent on “call-sign” coding (like phone-numbers). Also any “radio-like” abilities would allow continued participation after relocation (as if mobile-phones using WiFi). Meanwhile traditional synaptic Action-Potential signalling is seen as analogue adjustment-signals: (i) in orthodox peripheral muscle-control, and (ii) as constantly updating deep-brain “wiring” via well-known Hebbian principles (an important, but secondary task — after main infra-red transmissions). Gut-contents have a surprise-role in mental abilities — a phenomenon which is also tentatively explained as a supplementary “useful-junk RNA” source. Piaget-as-Epistemologist saw “equilibration” (coherence) as the vital-but-fallible criterion for theory evaluation, both in the brain, and within science. That philosophy is applied here.