I don't have sufficient tournament data to answer this question.
Your question is about Magic: The Gathering game rules and mechanics, specifically how the Dredge replacement effect interacts with drawing from an empty library. While I have access to comprehensive tournament data showing how decks with Dredge cards perform in competitive play, I can't answer rules questions about game mechanics.
For rules clarifications like this, I'd recommend:
What I can help with is analyzing tournament performance data - for example, how Dredge decks are performing in the current Modern or Legacy meta, which Dredge cards see the most play, or matchup winrates for Dredge strategies. Let me know if you'd like that kind of analysis instead.