The discussion centers on the definition of a vector space and the role of the additive identity. It questions how a space can be considered a vector space without a zero vector, proposing that if a vector e satisfies x + e = x for any vector x, then e acts as the zero vector. The conversation clarifies that in this specific vector space, e is not (0,0) but rather (1,0). This leads to the conclusion that (1,0) serves as the additive identity for this vector space. Understanding the nature of e is crucial for defining the vector space accurately.