diff --git a/Think Again.md b/Think Again.md
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@@ -2,4 +2,6 @@ Notes on Think Again, by Adam Grant.
 ## Chapter 3
 ### Main idea
 - People build more developed belief systems and improve if they are willing to challenge their beliefs.
-- It's unhealthy to hold beliefs and defend them so
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+- It's unhealthy to hold beliefs and defend them so aggressively
+- Being wrong and recognizing that is healthy
+- The way it's always be
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