bornrule
nounUK /ˈbɔːn ruːl/
US /ˈbɔːrn ruːl/
A born rule is a special rule in science that tells you how likely something is to happen when you look at it.
The born rule helps scientists guess what they will see when they measure a tiny particle.
OTHER MEANINGS
2. A rule that is present from the very beginning or from birth.
The club's born rule says every member must help clean up.
3. A basic principle that seems natural and inborn rather than learned.
Fairness is a born rule for most children.
4. In quantum physics, the formula that turns a wave function into actual chances.
Using the born rule, the scientist found a 50 percent chance of seeing the particle spin up.