I remember in 7th grade science class having to answer questions from the back of each chapter... but we had to put the question in the answer. Like "What % of the earth is water?" and we had to answer like "The earth is aproximatley 75% water." not "75%". And it really pissed me off. Fucking pointless. But now that skill has served me well in answering emails. Makes you (the reader) know what I'm talking about, what question I'm referring to, and allows for more complex answers and effective correspondence in general.