Can you spot a bad argument?

The world is constantly trying to persuade you about things - You should eat healthy and do exercise, that you're too young to go see Deadpool, and that you need to buy the latest iPhone.

Now, some of those things people are telling you have good and solid reasoning behind them. Strong arguments like: people who eat healthy food and exercise are generally much less likely to develop chronic diseases.

Some things have strong arguments, but ones that can be a little less solid depending on the circumstances: Deadpool is an MA15+ rated movie, and given the violence and sexual content it is definitely not suitable for most 12 year olds. However, is there really much difference between someone who is 14 years and 11 months old and someone who is 15?

Lastly, some arguments are just plain dumb. Why do you need the iPhone? because everyone else is getting one? Did you need something like it before it came out? or did you only realise you were unhappy with your phone when a better one existed? (I am not denying that you might want the phone, but I am suggesting that saying you need it is not very logical).

So, can you spot a dud argument?

If you are interested in the theory behind arguments and reasoning there are some more really good videos on YouTube, as well as an article you might be interested in reading that will help you build stronger arguments in your assignments:

How logical are you? 

How to Argue - Philosophical Reasoning: CrashCourse Philosophy #2 

How to Build a Strong Argument