Wang's Second Postulate is a theorem regarding multiple big bangs.
Many Starfleet science officers have tried to disprove Schlezholt's Theory of Multiple Big Bangs, but to do so you must ignore Wangs Second postulate. However, no matter how many times you disregard the postulate, it keeps popping up again and again, which has led to little success in disproving it.
In 2376, Captain Janeway commented on Crewman Harren's lack of success, as well as her own regarding this matter, noting "Wang's Second Postulate has more lives than a cat." (VOY: "Good Shepherd")