In the Area 51 FAQ it says this about the definition phase:
The goal is to come up with at least forty questions that embody the topic's scope. When at least ten questions have a score of at least ten net votes (up minus down), then the proposal is considered "defined."
However, on the Area 51 page for Digital Preservation, it says:
This proposal is in: Definition
The topic and audience are still being decided. It needs:
48 followers 40 questions with a score of 10 or more
to move to the next phase.
Which is it, 40 questions total with 10 having 10 net votes, or 40 questions with a score of 10?