How could we possibly answer that? It’s all about what subject you are more passionate about and want to debate. Having said that, article 1 lends itself best for a debate. Mostly because article 3 is all over the place (and is stating facts, not opinions) and article 2 has a question but there is an absolute answer (you could of course raise some questions about the topic on your own, like should this be possible, should people be protected against it, whatever).