The Calvinist challenge

Markku mentioned a theory that one reason the Calvinists tend to look like such contortionists here is because I am usually asking the questions. He thinks that the non-Calvinist position will look just as contortionist if it is the one being targeted. That’s addressed easily enough, as I will entertain five questions from the Calvinists here. But choose them carefully; I don’t want any complaints that I took the easy ones and if only I’d had to answer hard ones the results would have been completely different.

So, Team Calvin can use this thread to discuss the questions amongst themselves in order to settle upon the chosen five. Be sure to specify them at the end.