It is better to have a learned enemy than a foolish friend, I feel encouraged in this matter. An intelligent opponent will present reasonable rebuttals, but an ignorant friend may bring about disaster with his floundering: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.