Hi, I'm Amy Warnock. I'm a PhD student here at Edinburgh and a teaching assistant on this course. In this short film, I'll outline some of the rules of engagement and give some guidance on how we expect participants to interact with each other on the course. The discussion forum is the main place where you will interact. This is an open and collaborative environment and participants should feel they're able to say or ask anything, as long as they abide by the Coursera's code of conduct. Please the conduct before you use the discussion forums. Is a contentious subject. When using the forums, remember you are interacting with real people. Please be sensitive to this when posting questions or comments. Debate enthusiastically, but be polite and respectful, And be prepared to accept other people's opinions, even though they may not be the same as your own. Use evidence to support your arguments. Importantly, try not to respond to your classmates when you're feeling angry or frustrated. Here's an example. So I've got this Uncle Murdow, he's 93 years old. But for 60 years, he was addicted to carrots. He cured himself of this, however, by a stringent diet of watermelons and cabbage soup. >> That is interesting. But it's just one example from one person. What do you think about food addiction more generally? >> Food addiction, obviously, it's real. It stands to reason doesn't it? All these foods that have all this sugar and fat in it. Did you know that sugar is just the same as an addictive drug? >> What's the scientific consensus on that? >> If you don't believe me about food addiction, and you don't believe my Uncle Murdow's story, that makes you completely stupid. >> [SOUND] >> Anyway, I think that washing machines and central heating cause obesity. >> So as if we're eating washing machines. >> Yeah. Central heating keeps our bodies warm, so we don't have to do it. And washing machines do lots of work for us, so we don't use energy that way. All the food we eat doesn't get used expending energy, it just makes us put on weight. >> It's an interesting idea. Do you have any evidence for it? >> Probably, but it just makes sense when you think about it. >> Not necessarily. There are lots of things that appear to be related but aren't causally linked, storks and babies, for example. >> Never mind storks, there's lots of evidence that these cats and dogs that live in our houses are nice and warm. They're getting fat, too. >> In addition to interacting on the forums, you'll peer assess each other people's work. Please see how this peer assessment works on the course pages for guidance on what to expect when you give and receive feedback. Thanks for watching and we hope you enjoy the course [MUSIC]