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Ok, I'm going to try and phrase this in the such away that people don't downvote based on any implied opinion on my part.
I realize edits less than six characters are prohibited on Stack Overflow. Assuming I'm charged with explaining to someone new to SO why this is, can you provide or point me to the rationale? Please assume further that the person I'm explaining this too is particularly curious about the case of fixing typos and particularly typos in code.