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, then, is scriptural teaching on theological truths. Doctrine is indispensable to Christianity. Christianity does not exist without it. The New Testament repeatedly emphasizes the value and importance of sound doctrine, sound instruction (1 Tim 6:3), and a pattern of sound teaching (2 Tim 1:13-14).