Play as Voluntary Displacement with Guaranteed Return: The Biology of Pretend, the Ground State of Childhood, and Why Play Is Not Trivial

We apply the Displacement Framework to play, defining it structurally as voluntary entry into bounded displacement with a guaranteed return path. S0_play is the secure baseline that makes play possible: you cannot play from survival mode. Play deprivation is Phi_deprivation accumulation. Pretend play is voluntary entry into a counterfactual attractor. Rough-and-tumble play with its play signal marks the structural boundary between bounded and unbounded displacement.

Flow states are optimal attractor alignment. Screen time versus active play is analyzed as low-demand stimulation versus basin-building voluntary displacement. Stuart Brown's clinical evidence for play deprivation is formalized.