Re: The perfect Password
From a pedantic point of view you are correct, but you are using the term "guess" in the sense of a random selection. I am using the term to denote using some knowledge about a person to make an educated guess about what a password might be. A very simple example might be someone using their child's birthday as a password. My password-manager generated passwords have no bearing to me, anyone related to me, or anything I might dream up using my imagination. Yes, one could still "guess" one of those passwords, but the odds of doing so would be far worse than winning the powerbowl jackpot. From a practical point of view, they are impossible to guess.
Incidentally, another benefit of using a password manager is when dealing with those annoying but mandatory "security questions", which do nothing but weaken security. For those, I use more password-manager generated passwords. That way, I don't have to worry about people who might know my mother's maiden name, etc., getting access to my accounts.