That is the problem with Visitors.. visitor is a essentially a lifetime metric, but the logged in state fluctuates between hits...
If you only care about users who have ever logged in, and treat those as logged in, you could do a segment looking for visitors with a logged in hit... and for logged out, you could look for logged out, but add an exclusion for visitors who have ever logged in...
But since the login might have been 2 years ago, I am not sure that is really valid...
You could also potentially add a date qualifier to the above segments... of "today", or "last 7 days", etc....
That would make this a little more realistic...