The discussion centers on a potential mistake in the Venturimeter formula, highlighting that if both fluids have the same density, the calculated velocity would be zero, which is illogical. Participants suggest that the formula implies a condition where the density of one fluid must be greater than the other for accurate results. They emphasize that the manometer only functions correctly without flow, as it reflects pressure differences rather than velocity. A clarification is made regarding the application of Bernoulli's equation, noting the need to relate pressures at different points accurately. Overall, the conversation focuses on the correct interpretation and application of fluid dynamics principles in the context of the Venturimeter.