In the early centuries A.T., human life expectancies grew longer
and longer, and other truly un-ageing sophonts such as AIs and
vecs appeared. Some thinkers worried about the consequences of
this un-ageing state. How it might, in the future, leave the
older sophonts, whose personalities were forged in earlier and
perhaps radically different times, unable to adjust to or cope
with existence. Spurred on by this, some sophontologists began
to work to provide a solution to this problem. In the end, the
solution they arrived at was to modify a sophonts neural
structure so that their personalities did not become fixed as
they matured. Instead, they would remain entirely plastic and
able to adapt to changing circumstances, permanently retaining a
child-like mental flexibility, though with changes occurring
more slowly than in a baseline human child. Only memory would
remain constant with time. Based on the Slearner modification,
but far more radical and deep-seated than it, the most radical
matter was arriving at an