Would anyone consider themselves fluent in a set of texts?

Greetings all,

Would anyone here consider themselves fluent in a set of texts?

Some definitions of what I mean.

• Knows around 10-15K words or more. This is the rough vocabulary of 8-11-year-old English speakers.
• Understands every inflection.
• Understands every idiom, chiasmus, and rhetoric used.

Ancient Greek covers a long historical period, so I think not knowing the Greek of every historical period would disqualify someone as being fluent. E.G., I'm a fluent English speaker, but I wouldn't understand Shakespearean English the way an English classics major would.