diff --git a/helpful_life_advice.myco b/helpful_life_advice.myco
index aecc6b3..a50fbf0 100644
--- a/helpful_life_advice.myco
+++ b/helpful_life_advice.myco
@@ -20,4 +20,5 @@
 *. When deciding on a course of action in an uncertain situation, commit to something and do it properly rather than inefficiently trying to handle every possible scenario. See also [[https://www.lesswrong.com/posts/FMkQtPvzsriQAow5q/the-correct-response-to-uncertainty-is-not-half-speed]].
 *. People respond to incentives, and also don't like acknowledging this. Intentions matter inasmuch as they are predictive of future behaviour.
 *. "Everything is seating charts" (Matt Levine) - "petty" minor details actually affect a lot of things, especially if they influence how you'll spend lots of your time.
-*. Making assumptions is unavoidable but enumerate and check them sometimes.
\ No newline at end of file
+*. Making assumptions is unavoidable but enumerate and check them sometimes.
+*. You can evaluate hard claims by breaking them down using general/physical principles and wildly estimating numbers.
\ No newline at end of file