If you want to approach the knowledge by inductive process, by studying each man, whether he is mortal or immortal, you may study thousand, two thousand, five thousand, but you cannot study all the men. Therefore your conclusion remains always defective: 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.