About plagiarism in my opinion, I a little bit agree. It means I agree a few part of plagiarism. There are too many people in the world. Sometimes, a few people can have same idea. If they have same idea, you cannot blame them. But if many sentences are same in one’s article, that is the problem.
If you want to use other’s article or sentences, you should tell the owners or quote that. There is other way like changing your own words. First time, when you write something, you need other’s helping. You will read other’s article or hear other’s experience. In this case, you can quote a little bit like “Plagiarism is making us crazy”(Toward a Rational Response to Plagiarism). However, before using other’s sentences, please think again with your mind.