Why do you say that? How does this relate to our discussion? "Are you going to include diffusion in your mole balance equations?"
What would be an alternative? What is another way to look at it? Would you explain why it is necessary or beneficial, and who benefits? Why is the best? What are the strengths and weaknesses of...? How are...and ...similar? What is a counterargument for...? "With all the bends in the pipe, from an industrial/practical standpoint, do you think diffusion will affect the conversion?"
