This isn't in reference to any particular question, but to a comment from a moderator, "you are free to challenge my deletion on meta."
Is there a process for undeleting a question/answer on Skeptics.SE? I ask, because when clicking the undelete button a tooltip explained, voting to undelete moderators decisions isn't possible.
What is the process on meta to reverse the decision of a moderator? (will the decision only include users with 10k reputation able to see the deleted question/answer, I.e. 5 of 9 users who aren't moderators)
What is required to be successful? (Does this require a simple majority, 5 upvotes, or another moderator who agrees with you?
Note: This is not about a particular question, I would like to know the process in general.