Hang on shinny, would you do a 'however', challenging kind of paragraph when the prompt is a "discuss" one as well?
Discussion questions are far more restrictive. It'd really depend on how far I am deviating from the topic and as a general rule, I wouldn't go for a direct opposition and would obviously avoid listing factors outside the scope of the topic. The only exception is if the topic is worded as an absolute. For example, if the topic was that a certain trait in a character was the
only factor that led to his downfall, I would then say other traits were involved which is kind of like a challenge I guess. However, if it wasn't worded as an absolute, this wouldn't be possible. In such cases, I'd try to showoff by either using more unique evidence, or taking a unique perspective on the topic by analysing its key words and perhaps challenging some of them. For example, if a topic says something like 'For the characters in this book, their selfishness ultimately led to their downfall', I'd attempt to challenge the phrase 'the characters' by finding certain characters which are an exception to this rule. It's very difficult to give you a definitive answer of what I'd accept as a legitimate challenge in a discuss question and what's not, but I hope these few examples helps to show roughly what I'd consider legit.