When the tip disintegrates, it melts and helps solidify the weld to the base material. Arc studs range from a #8 to 1 1â4  diameter. The lengths are variable from 3/8 to 60 (for deformed bars). Arc studs are typically loaded with an aluminum flux ball on the weld end which aids in the welding process.
Quoted from wiki: Inevitable discovery is a doctrine in United States criminal procedure that allows evidence of a defendant's guilt that would otherwise be considered inadmissible under the exclusionary rule to be admitted into evidence in a trial.
Doctrine is a set of accepted beliefs held by a group. In religion, it is the set of true beliefs that define the parameters of that belief system. Hence, there is true doctrine and false doctrine relative to each belief set. In Christianity, for example, a true Biblical doctrine is that there is only one God in all existence (Isaiah 43:10; 44:6, 8). A false doctrine is that there is more than one God in all existence.