hair-splitting◼◼◼(the act of finding exceedingly small differences which are neither important nor prominent) noun [UK: ˈheə.ˈsplɪ.tɪŋ] [US: ˈheə.ˈsplɪ.tɪŋ]
nitpicking [nitpickings]◼◼◼(any process of finding or pointing out tiny details or errors) noun [UK: ˈnɪt.ˌpɪkɪŋ] [US: ˈnɪt.ˌpɪkɪŋ]