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Core claim: The ibex teaches IBEX by living it: an inside creature with a body-boundary moves through a reachable environment while the rest of the mountain remains beyond its horizon. Later, the ibex can also teach gradient navigation: local pathfinding through rugged terrain without global omniscience.
High on a mountain lived a young ibex.
The mountain was huge.
It had cliffs, cracks, ledges, snow, stones, shadows, and little patches of grass that grew where no sensible grass should grow.
From the valley below, the mountain looked like a wall.
From the sky above, it looked like a wrinkled blanket.
But to the ibex, the mountain looked like something else.