It's been a long time. This is because people make the same mistakes over and over again and it's hard to find new things to say.
It's been a long time. The reason is that people make the same mistakes over and over again and it's hard to find new things to say.
Either of the sentences above is fine. Not fine is "The reason is because people make the same mistakes...". They don't match. Because doesn't belong with reason. You can't have both terms together.
A similar problem is to be found in the names of things. My name is Ian. My name is not called Ian. I am called Ian. So far as I am aware, my name isn't called anything. As for second the book I wrote, its name is Optical Illusion. The name of the book is Optical Illusion. The book is called Optical Illusion. But the name of the book is not called Optical Illusion. In fact, once again, the name of the book isn't called anything.
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