User blog comment:El Alamein/Voldemort vs. General Grievous/@comment-4484220-20130927200542/@comment-4484220-20130927221859

Whether or not Grievous will be able to sneak up on Voldemort hinges upon a fundamental subjective disagreement you and I have on the rating of likelihood that Grievous will be able to sneak up on Voldemort when factoring in our own estimations of the latter's reaction time and common sense, and the former's stealth and agility. My estimation is that that outcome is not likely, and yours is that it's entirely possible. Simple as that.