The Four Sciences

Summary

The classical four fundamental forces of physics — gravity, electromagnetism, the strong nuclear force, the weak nuclear force — against which Exurb1a proposes The Fifth Science as a possible companion. The label “sciences” rather than “forces” is the book’s signature move: Exurb1a is implicitly redescribing the ordinary classical inventory as four disciplines of study, and then positioning consciousness as a fifth discipline of equal standing.

Note: Ch. 02 — Timeline of The 500 Year Climb mentions a “second Higgs mechanism” and a “seventh time dimension,” suggesting the in-universe physics has already diverged from our 21st-century understanding by the time the A.L. era begins. The “four” in “the fifth science” may therefore be a 21st-century-reader framing the book uses to orient us, not a literal count of the A.L.-era Standard Model.

In the book

• Ch. 03 — For Every Dove a Bullet: K. Pasternak’s 5-Churten collider is explicitly designed to find the fifth-force carrier — the Nooticle — in addition to the forces of classical physics. The story is the book’s clearest in-universe dramatisation of a “four plus one” research programme.
• Ch. 15 — Notes on Why Stuff Got Written: “aspects of consciousness can’t be explained in terms of our current physical frameworks … Instead, consciousness might be another fundamental force alongside the regular four – hence: the fifth.”

Real-world grounding

• Gravity, electromagnetism, the strong force, the weak force — the four fundamental interactions.

Related

• The Fifth Science
• Fidon, Melnitron — in-universe physics that has moved past the four.

Open questions

• Does any story describe what the A.L. era considers its fundamental force count, given the seventh time dimension and second Higgs mechanism?