Failure is a teacher, not a defeat, but the research reveals a catch the poster never prints: left alone we learn almost nothing from our own failures, and here is what actually turns one into a lesson

Failure is a teacher, not a defeat, goes the reassuring line, and it hangs on enough office walls to feel beyond question. It is a good sentiment, and mostly a true one, but it turns out to be more conditional than the poster admits. Failure does not teach au…