Function verify_conditioning_reduces_entropy 

pub fn verify_conditioning_reduces_entropy<FCond, FMarg>(
    conditional_entropy: FCond,
    marginal_entropy: FMarg,
    x: &[u8],
    y: &[u8],
    tolerance: f64,
) -> bool
where
    FCond: Fn(&[u8], &[u8]) -> f64,
    FMarg: Fn(&[u8]) -> f64,

Verify conditioning reduces entropy: H(X|Y) ≤ H(X).