A colleauge and I are in disagreement. Before Darth Vader died in Episode VI did he revert back to the light side of the Force? I have aggressively argued that he did not as it was only a momentary realisation of his errors and could have been a feign attempt at gaining some form of redemption. Whereas my colleague, who favours Star Trek to Star Wars and doesn't understand the intricacies of the Force, believes that he had in fact transcended sides.
It took Anakin years to be completely consumed by the dark side, yet Vader made the same switcheroo in 2 minutes? Questionable to say the least.