diff --git a/src/coord.rs b/src/coord.rs
index d90caf8..95b318d 100644
--- a/src/coord.rs
+++ b/src/coord.rs
@@ -236,7 +236,7 @@ where
     /// Panics if any:
     ///
     /// - `rtt <= 0.0`
-    /// - This coordinate's AND the other's error estimate `<= 0.0`
+    /// - This coordinate's OR the other's error estimate `<= 0.0`
     pub fn update_until(&mut self, rtt: f64, other: &Coord<T>, threshold: f64, cfg: &Config) {
         // TODO: dont go negative
         let low = rtt - threshold;
@@ -263,11 +263,9 @@ where
     /// Panics if any:
     ///
     /// - `rtt <= 0.0`
-    /// - This coordinate's AND the other's error estimate `<= 0.0`
+    /// - This coordinate's OR the other's error estimate `<= 0.0`
     pub fn update(&mut self, rtt: f64, other: &Coord<T>, cfg: &Config) {
-        // @TODO assert or Err()?
-        assert!(self.error_estimate > 0.0 || other.error_estimate > 0.0);
-        assert!(rtt > 0.0);
+        assert!(self.error_estimate > 0.0 && other.error_estimate > 0.0 && rtt > 0.0);
 
         // Sample weight balances local and other error
         //  - A high local error = greater movement
diff --git a/src/node.rs b/src/node.rs
index 0a2f6d2..2d30375 100644
--- a/src/node.rs
+++ b/src/node.rs
@@ -207,7 +207,7 @@ where
     /// Panics if any:
     ///
     /// - `rtt <= 0.0`
-    /// - This coordinate's AND the other's error estimate `<= 0.0`
+    /// - This coordinate's OR the other's error estimate `<= 0.0`
     pub fn update_until(&mut self, rtt: Duration, other: &Coord<V>, threshold: f64) {
         self.coord.update_until(
             f64::max(f64::MIN_POSITIVE, rtt.as_secs_f64()),
@@ -274,7 +274,7 @@ where
     ///
     /// Panics if any:
     ///
-    /// - This coordinate's AND the remote's error estimate `<= 0.0`
+    /// - This coordinate's OR the remote's error estimate `<= 0.0`
     pub fn update(&mut self, rtt: Duration, other: &Coord<V>) -> bool {
         let coord = self.coord.clone();
         if let Err(Error {