The discussion revolves around the qualifications and titles associated with being a physicist. Participants debate whether one can call themselves a physicist without a PhD, with opinions varying widely. Some argue that a PhD is necessary, while others believe that anyone with a degree in physics or who actively engages in physics-related work can claim the title. The conversation touches on the distinction between being a student, a researcher, and a professional physicist, with some participants suggesting that job titles should reflect one's current role and responsibilities. There is also a discussion about the relevance of job titles in different contexts, such as academia versus industry, and the implications of using titles like "engineer" or "physicist" without formal credentials. The thread highlights the complexities of identity and professional titles in the scientific community, emphasizing that the definition of a physicist can vary based on individual perspectives and experiences.