/// is deviated from.
/// - Lastly, there are multiple bit patterns that are considered NaN.
/// Rust does not currently guarantee that the bit patterns of NaN are
-/// preserved over arithmetic operations,
-/// so there may be some surprising results upon inspecting the bit patterns,
+/// preserved over arithmetic operations, and they are not guaranteed to be
+/// portable or even fully deterministic! This means that there may be some
+/// surprising results upon inspecting the bit patterns,
/// as the same calculations might produce NaNs with different bit patterns.
///
/// For more information on floating point numbers, see [Wikipedia][wikipedia].