The discussion focuses on understanding Carnot efficiency and its implications for process feasibility. The user calculates efficiency using the formula 1 - Tlow/T high, resulting in 5/6, and compares it to the Carnot efficiency of 0.5 derived from work and heat input. Questions arise about the significance of Carnot efficiency and whether any process can exceed it. The importance of Carnot efficiency lies in its role as a theoretical maximum for efficiency in heat engines. Ultimately, the feasibility of the process is assessed based on these efficiency metrics.