Nature's Observations as Guides to PhysicalMechanism Discovery

Physics has accumulated observations, constants, equations, and conservation laws that are useful notonly for rejecting incompatible physical models but also for informing and guiding the discovery ofunderlying mechanisms. This paper articulates the “Constrain, Inform, and Guide” principle and applies itto the SP3 hypothesis of a structured space medium. The visible cases of iron-filing magnetic alignment andthe Olympic hammer throw motivate questions about orientation-dependent interaction energy, torque,angular momentum, and persistence of motion. Maxwell’s electromagnetic relations, the fine-structureconstant, de Broglie phase relations, hydrogen spectra, electron spin and magnetic moments, andquantum interference provide progressively stricter physical constraints and constructive clues. Anillustrative hydrogen calculation reproduces known atomic energy scales using established assumptions; itdoes not independently validate SP3. The paper proposes a mechanism registry, an explicit hierarchy ofevidential achievement, and independently testable research projects. Researchers are invited to examineindividual candidates, develop competing mechanisms, and report negative as well as positive results.