The term "V'tosh ka'tur" referred to "Vulcans without logic." In Vulcan, it was used by elders to refer to anyone who disagreed with ancestral teachings. Around 2143, a group of these Vulcans left Vulcan aboard the starship Vahklas. The crew of Enterprise NX-01 encountered the Vahklas in 2151 while en route to the Arachnid Nebula. Their ship's captain, Tavin, requested some assistance in the repair of their propulsion and life support.