Comments on the results of experimental searches for vector-like leptons at CERN

There are strong phenomenological arguments favoring the existence of vector-like leptons and quarks in nature. In spite of extensive studies conducted in search of VLQs, there are only a limited number of experimental studies on VLLs. However, these searches do not include all possible decay modes of VLLs. Therefore, the analyses done so far are incomplete. In this paper, we discuss decay channels that are not covered by different experimental analyses, with a focus on L3, ATLAS, and CMS results. We argue that experimental analyses should be redone considering these shortcomings.