Jack, sorry about that. I think I must have mis read what I took for your uni career!! Nothing wrong with being agricultural The thing about unis is there is a time and place for this robust discussion to take place. Certainly, at lectures you sit there and absorb the material; the basic curriculum. Then, at tutorials or in assignments, you get the opportunity to challenge your teachers with your own considered views. I would be suggesting to your niece and nephew that they muster their arguments and present them in the best way they can. Generally, it's not so much what is said that matters, it's more that what is said is logical and can be substantiated with verifiable facts.