Struct Knob 

pub struct Knob {
    pub name: &'static str,
    pub current: f64,
    pub kinds: &'static [&'static str],
    pub set: fn(&mut Weights, f64),
}

One hand-set weight: its name, current value, the outcome kinds it weighs (its evidence), and how a candidate sets it.

Fields

name: &'static str

current: f64

kinds: &'static [&'static str]

set: fn(&mut Weights, f64)