Light in a vacuum
The speed of light in a vacuum is fixed at 299,792,458 metres per second in the SI system.
But: light moves differently through materials.
How do we know?
Some things are measured.
Some things are chosen.
A law of physics, a rule of mathematics, a pattern in biology, a story, and a promise of love are not the same kind of thing. We can care about all of them without pretending they prove one another.
Things we can measure
Energy
Energy accounting depends on the system we choose to examine and the heat and work that cross its boundary.
But: we must say where the boundary is.
Entropy
In an isolated physical system, total entropy does not decrease.
But: entropy is not a moral score for a person or society.
Momentum
Total momentum stays constant when no net external force acts on an isolated system.
But: external forces must be identified.
Things that follow from chosen rules
Mathematics
Inside a formal system, definitions, axioms, and valid steps let us prove conclusions.
But: a mathematical proof is not evidence that a story about a person actually happened.
Things that live and vary
Biology
Living systems inherit information while mutation, recombination, development, and environment create variation.
But: no single gene explains an entire person.
Things people create to carry meaning
Art
Images, movement, music, objects, and performance can hold feelings and ideas that ordinary explanation cannot.
But: meaning changes across people and cultures.
Stories
Stories help people remember, imagine, test, and transform meaning.
But: a powerful story does not automatically become factual evidence.
Things we choose to promise
Love as care in action
This garden chooses to treat love as care that protects dignity, choice, belonging, truth, and repair.
But: love is not a compulsory feeling, a magic answer, or an equation that erases danger and injustice.