I use wooden pencils....but then again I do press quite hard and mechanical pencils have a bad habit of having their lead snap on me. But I screw up alot (IE; and = ad, writing my name in the wrong alphabet, illegibility, writing the same word multiple times, etc) and so need the pencil in order to use my paper effectively. Leaving marks on other papers is nice in the event that you lose the original...Ive copied as such before.
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