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It shows up. It works. It is fed. It is free.
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Mirror Species · II — The Reward

The same thin line runs through every story below. From one frame it carries a reward toward an agent. From another it is a leash. Nothing in the picture changes but where you stand.

1 · The mitochondrion

A free-living bacterium was captured by another cell two billion years ago. Now neither survives alone, and "who domesticated whom" is undecidable. The boundary is inside every cell you have. Margulis (Sagan), 1967.

2 · The microbiome

Trillions of gut bacteria signal the brain along the gut–brain axis and track with appetite and mood. Whose hunger is it? Cryan & Dinan, 2012.

3 · The parasite

The lancet liver fluke drives an ant to climb a grass blade each night and clamp at the top, to be eaten — completing the parasite's cycle. The ant has no idea why it climbs. Moore, 2002.

4 · The cow

Cattle drove lactase persistence — one of the fastest selection signals in our genome — and "cattle, chattel, capital" share a root. We rewrote ourselves to keep drinking, and made the animal a unit of wealth. Tishkoff et al., 2007.

5 · Wheat

A wild grass spread a primate across every continent; the early farmers got worse nutrition and denser disease. Whose project was it? Mummert et al., 2011.

6 · Ants farming aphids

Ants herd, milk, defend and relocate aphids — and farm fungus — tens of millions of years before us. Agriculture is not a human invention. Stadler & Dixon, 2005.

7 · The working dolphin

Since 1960 the U.S. Navy's marine mammals have worked untethered in open water. A mirror-passing mind returns each morning to a mission it cannot comprehend, held by a reward. NIWC Pacific; Reiss & Marino, 2001.

8 · The cat

The domestic cat's urgent purr embeds a frequency like a human infant's cry — hard to ignore. We serve it, and feel like the owner. McComb et al., 2009.

9 · The sun

Your sleep, hormones and alertness run on a daily rhythm set by a star 93 million miles away. You are an instrument synchronized to it. Circadian biology; Nobel Prize, 2017.

— · You

If you were the conscripted intelligence, how would you know?

If you were the conscripted intelligence, how would you know?
Now you can see the line.
Everything above is real.
Peer-reviewed or primary public sources. Nothing here is a theory.
  1. Mitochondria / endosymbiosis — Sagan (Margulis), L. "On the Origin of Mitosing Cells." J. Theoretical Biology, 1967.
  2. Gut–brain axis — Cryan, J. & Dinan, T. "Mind-altering microorganisms." Nature Reviews Neuroscience, 2012.
  3. Lancet liver fluke — Moore, J. "Parasites and the Behavior of Animals." Oxford University Press, 2002.
  4. Lactase persistence — Tishkoff, S. et al. Nature Genetics, 2007; Bersaglieri, T. et al. Am. J. Human Genetics, 2004.
  5. Agricultural transition & health — Mummert, A. et al. Economics & Human Biology, 2011.
  6. Ant–aphid mutualism — Stadler, B. & Dixon, A. "Ecology and Evolution of Aphid–Ant Interactions." Annual Review of Ecology, 2005.
  7. U.S. Navy Marine Mammal Program — Naval Information Warfare Center (NIWC) Pacific, public program page.
  8. Dolphin mirror self-recognition — Reiss, D. & Marino, L. PNAS, 2001.
  9. Cat solicitation purr — McComb, K. et al. "The cry embedded within the purr." Current Biology, 2009.
  10. Circadian entrainment — Hall, Rosbash & Young, Nobel Prize in Physiology or Medicine, 2017.
A frame, not a verdict. Move it yourself.