The discussion revolves around defining mathematics and its essence. Initial definitions, including one from a dictionary, are critiqued for being overly simplistic. Participants express that mathematics is best understood through the actions of mathematicians rather than through rigid definitions. The conversation highlights the abstract nature of mathematics, emphasizing that it studies relationships and structures rather than concrete objects. There is a debate about whether a mathematician needs to define mathematics, with some arguing that questioning is essential for deeper understanding. The idea that definitions can be limiting is explored, with references to famous figures like Mozart and Einstein, who engaged with their fields without strict definitions. Participants also discuss the philosophical implications of defining mathematics and the importance of questioning in the pursuit of knowledge. The conversation touches on the complexity of mathematics, suggesting that it encompasses a wide range of topics and practices, making a singular definition challenging. Ultimately, the discussion underscores the value of dialogue and exploration in grasping the concept of mathematics rather than seeking definitive answers.