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The lesson: Think about what the other person needs to know to fulfil your requirement without needing further exchange of information.
Otherwise, further communication is needed, which slows you down. OR, the person makes their own assumptions ("here's a 50g packet of flaked almonds!”) and the whole process becomes blocked and rework is needed.
It takes longer to do the initial work, but you get your cake baked on time for the birthday party!!