premise: Bath Salt Zombies is a 2013 American horror comedy directed by Dustin Mills, written by Mills and Clint Weller, and starring Josh Eal, Ethan Holey, Jackie McKown, Dave Parker, and Brandon Salkil. It is about zombie attacks brought on by concentrated bath salts.
hypothesis: Bath Salt Zombies was not released after 2018.  
reason: Bath Salt Zombies was released in 2013, which is before 2018.   So it was not released after 2018.