Function learn_reading 

pub fn learn_reading(
    rows: usize,
    moved: usize,
    forecasts: &[Forecast],
    outcome: &str,
    calibration: &BTreeMap<String, Calibration>,
) -> String

What a learn did. The rows are the next settle’s weights. This call is not a settle. The scores, when any ballot stated a probability, are not trust weights. calibration is each voter’s record after this outcome is folded in.