"The fermentation, because Reinhart says it is when the flavour develops". It is the stage when the yeast combines with the sugar to develop the flavour of the bread.
No, I didn't, but I was very impressed after listening to Reinhart in his Ted talk. I really like when he said that "flavour" was the most important thing when making bread. For him, flavour was the key element and the most essential.
Thus, this could be the answer.
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